Table of Contents
The following is a listing of all possible events you can use to start a trigger with. Each trigger can only have one single event, i.e. you cannot create triggers that are called when any of several events occurrs.

Please also note that the ‘on’ at the start of an event is entirely optional but it just looks better in my opinion, and that most events don't have examples since there is only one way to use them.

At Time

patterns[?]:
at %time% [in %worlds%]
since:
1.3.4
An event that occurs at a given minecraft time in every world or only in specific worlds.
examples:
at 18:00
at 7am in "world"

On Bed Enter

patterns[?]:
[on] bed enter[ing]
[on] [player] enter[ing] [a] bed
since:
1.0
Called when a player starts sleeping.

On Bed Leave

patterns[?]:
[on] bed leav(e|ing)
[on] [player] leav(e|ing) [a] bed
since:
1.0
Called when a player leaves a bed.

On Block Damage

patterns[?]:
[on] block damage
since:
1.0
Called when a player starts to break a block. You can usually just use the leftclick event for this.

On Break / Mine

patterns[?]:
[on] [block] (min(e|ing)) [[of] %item types%]
since:
1.0 (break), unknown (mine)
Called when a block is broken by a player. If you use 'on mine', only events where the broken block dropped something will call the trigger.
examples:
on mine
on break of stone
on mine of any ore

On Bucket Empty

patterns[?]:
[on] bucket empty[ing]
[on] [player] empty[ing] [a] bucket
since:
1.0
Called when a player empties a bucket. You can also use the place event with a check for water or lava.

On Bucket Fill

patterns[?]:
[on] bucket fill[ing]
[on] [player] fill[ing] [a] bucket
since:
1.0
Called when a player fills a bucket. Like the bucket empty event, you can also use the break event with a check for water or lava.

On Burn

patterns[?]:
[on] [block] burn[ing] [[of] %item types%]
since:
1.0
Called when a block is destroyed by fire.
examples:
on burn
on burn of wood, fences, or chests

On Can Build Check

patterns[?]:
[on] [block] can build check
since:
1.0 (basic), 2.0 ([un]cancellable)
Called when a player rightclicks on a block while holding a block or a placeable item. You can either cancel the event to prevent the block from being built, or uncancel it to allow it.
Please note that the data value of the block to be placed is not available in this event, only its ID.

On Chat

patterns[?]:
[on] chat
since:
1.4.1
Called whenever a player chats.

On Chunk Generate

patterns[?]:
[on] chunk (generat|populat)(e|ing)
since:
1.0
Called after a new chunk was generated.

On Chunk Load

patterns[?]:
[on] chunk load[ing]
since:
1.0
Called when a chunk loads. The chunk might or might not contain mobs when it's loaded.

On Chunk Unload

patterns[?]:
[on] chunk unload[ing]
since:
1.0
Called when a chunk is unloaded due to not being near any player. Cancel the event to force the server to keep the chunk loaded and thus keep simulating the chunk (e.g. physics, plant growth, minecarts, etc. will keep working and won't freeze).

On Click

patterns[?]:
[on] [(right|left)[( |-)]][mouse[( |-)]]click[ing] [on %entity type/item type%] [(with|using|holding) %item type%]
[on] [(right|left)[( |-)]][mouse[( |-)]]click[ing] (with|using|holding) %item type% on %entity type/item type%
since:
1.0
Called when a user clicks on a block, an entity or air with or without an item in their hand.
Please note that rightclick events with an empty hand while not looking at a block are not sent to the server, so there's no way to detect them.
examples:
on click
on rightclick holding a fishing rod
on leftclick on a stone or obsidian
on rightclick on a creeper
on click with a sword

On Combust

patterns[?]:
[on] combust[ing]
since:
1.0
Called when an entity is set on fire, e.g. by fire or lava, a fireball, or by standing in direct sunlight (zombies, skeletons).
See also: on ignition - called when a block catches fire.

On Command

patterns[?]:
[on] command [%text%]
since:
2.0
Called when a player enters a command (not necessarily a Skript command).
Please define a custom command if possible instead of using this event. Use this event only if you need to perform some action on multiple command, e.g. to prevent commands under certain circumstances, to log commands, or to add Skript checks to commands from other plugins that cannot be solved by changing the permissions of the player(s).
examples:
on command
on command "/stop"
on command "pm Njol "

On Connect

patterns[?]:
[on] [player] connect[ing]
since:
2.0
Called when a player connects to the server. This event is called before the player actually joins the server, so if you want to prevent players from joining you should prefer this event over on join.
examples:
on connect:
	player doesn't have permission "VIP"
	number of players is larger than 20
	kick the player due to "The last 5 slots are reserved for VIP players."

On Consume

patterns[?]:
[on] [player] ((eat|drink)[ing]|consum(e|ing)) [[of] %item types%]
since:
2.0
Called when a player is done eating/drinking something, e.g. an apple, bread, meat, milk or a potion.

On Craft

patterns[?]:
[on] [player] craft[ing] [[of] %item types%]
since:
unknown
Called when a player crafts an item.

On Creeper Power

patterns[?]:
[on] creeper power
since:
1.0
Called when a creeper is struck by lighting and gets powered. Cancel the event to prevent the creeper from being powered.
See also: on lightning strike

On Damage

patterns[?]:
[on] damag(e|ing) [of %entity type%]
since:
1.0
Called when an entity receives damage, e.g. by an attack from another entity, lava, fire, drowning, fall, suffocation, etc.
examples:
on damage
on damage of a player

On Death

patterns[?]:
[on] death [of %entity types%]
since:
1.0
Called when a living entity (including players) dies.
examples:
on death
on death of player
on death of a wither or ender dragon:
	broadcast "A %entity% has been slain in %world%!"

On Dispense

patterns[?]:
[on] dispens(e|ing) [[of] %item types%]
since:
unknown
Called when a dispenser dispenses an item.

On Drop

patterns[?]:
[on] [player] drop[ing] [[of] %item types%]
since:
unknown
Called when a player drops an item from his inventory.

On Enderman/Sheep

patterns[?]:
[on] enderman place
[on] enderman pickup
[on] sheep eat
since:
unknown
Called when an enderman places or picks up a block, or a sheep eats grass respectively.

On Experience Spawn

patterns[?]:
[on] [e]xp[erience] [orb] spawn
[on] spawn of [a[n]] [e]xp[erience] [orb]
since:
2.0
Called whenever experience is about to spawn. This is a helper event for easily being able to stop xp from spawning, as all you can currently do is cancel the event.
Please note that it's impossible to detect xp orbs spawned by plugins (including Skript) with Bukkit, thus make sure that you have no such plugins if you don't want any xp orbs to spawn. (Many plugins that only change the experience dropped by blocks or entities will be detected without problems though)
examples:
on xp spawn:
	world is "minigame_world"
	cancel event

On Explode

patterns[?]:
[on] explo(d(e|ing)|sion)
since:
1.0
Called when an entity (a primed TNT or a creeper) explodes.

On Explosion Prime

patterns[?]:
[on] explosion prime
since:
1.0
Called when an explosive is primed, i.e. an entity will explode shortly. Creepers can abort the explosion if the player gets too far away, while TNT will explode for sure after a short time.

On Fade

patterns[?]:
[on] [block] fad(e|ing) [[of] %item types%]
since:
1.0
Called when a block 'fades away', e.g. ice or snow melts.
examples:
on fade of snow or ice

On First Join

patterns[?]:
[on] first (join|login)
since:
1.3.7
Called when a player joins the server for the first time.

On Fishing

patterns[?]:
[on] [player] fish[ing]
since:
1.0
Called when a player fishes something. This is not of much use yet.

On Flow

patterns[?]:
[on] [block] flow[ing]
[on] block mov(e|ing)
since:
1.0
Called when a blocks flows or teleports to another block. This not only applies to water and lava, but teleporting dragon eggs as well.

On Form

patterns[?]:
[on] [block] form[ing] [[of] %item types%]
since:
1.0
Called when a block is created, but not by a player, e.g. snow forms due to snowfall, water freezes in cold biomes, or a block spreads (see spread event).
examples:
on form of snow
on form of a mushroom

On Fuel Burn

patterns[?]:
[on] fuel burn[ing]
since:
1.0
Called when a furnace burns an item from its fuel slot.

On Gamemode Change

patterns[?]:
[on] game[ ]mode change [to %gamemode%]
since:
1.0
Called when a player's gamemode changes.
examples:
on gamemode change
on gamemode change to adventure

On Grow

patterns[?]:
[on] grow [of %tree type%]
since:
1.0
Called when a tree or giant mushroom grows to full size.
examples:
on grow
on grow of a tree
on grow of a huge jungle tree

On Heal

patterns[?]:
[on] heal[ing]
since:
1.0
Called when an entity is healed, e.g. by eating (players), being fed (pets), or by the effect of a potion of healing (overworld mobs) or harm (nether mobs).

On Hunger Meter Change

patterns[?]:
[on] (food|hunger) (level|met(er|re)|bar) chang(e|ing)
since:
1.4.4
Called when the hunger bar of a player changes, i.e. either increases by eating or decreases over time.

On Ignition

patterns[?]:
[on] [block] ignit(e|ion)
since:
1.0
Called when a block starts burning, i.e. a fire block is placed next to it and this block is flammable.
The burn event will be called when the block is about do be destroyed by the fire.
See also: on combust - called when an entity is set on fire.

On Item Break

patterns[?]:
[on] [player] tool break[ing]
[on] [player] break[ing] [(a|the)] tool
since:
2.1.1
Called when a player breaks his tool because its damage reached the maximum value.
This event cannot be cancelled.

On Item Spawn

patterns[?]:
[on] item spawn[ing] [[of] %item types%]
since:
unknown
Called whenever an item stack is spawned in a world, e.g. as drop of a block or mob, a player throwing items out of his inventory, or a dispenser dispensing an item (not shooting it).

On Join

patterns[?]:
[on] [player] (login|logging in|join[ing])
since:
1.0
Called when a player joins the server. The player is already in a world when this event is called, so if you want to prevent players from joining you should prefer on connect over this event.
examples:
on join:
	message "Welcome on our awesome server!"
	broadcast "%player% just joined the server!"

On Kick

patterns[?]:
[on] [player] (kick|being kicked)
since:
1.0
Called when a player is kicked from the server. You can change the kick message or cancel the event entirely.

On Leaves Decay

patterns[?]:
[on] leaves decay[ing]
since:
1.0
Called when a leaf block decays due to not being connected to a tree.

On Level Change

patterns[?]:
[on] [player] level [change]
since:
unknown
Called when a player's level changes, e.g. by gathering experience or by enchanting something.

On Lightning Strike

patterns[?]:
[on] lightning [strike]
since:
1.0
Called when lightning strikes.
Use on creeper power and on pig zap to find out if one or more creepers and/or pigs were hit.

On Move On

patterns[?]:
[on] (step|walk)[ing] (on|over) %*item types%
since:
2.0
Called when a player moves onto a certain type of block. Please note that using this event can cause lag if there are many players online.
examples:
on walking on dirt or grass
on stepping on stone

On Physics

patterns[?]:
[on] [block] physics
since:
1.4.6
Called when a physics check is done on a block. By cancelling this event you can prevent some things from happening, e.g. sand falling, dirt turning into grass, torches dropping if their supporting block is destroyed, etc.
Please note that using this event might cause quite some lag since it gets called extremely often.
examples:
# prevents sand from falling
on block physics:
	block is sand
	cancel event

On Pick Up

patterns[?]:
[on] [player] (pick[ ]up|picking up) [[of] %item types%]
since:
unknown
Called when a player picks up an item. The item is still on the ground when this event is called.

On Pig Zap

patterns[?]:
[on] pig[ ]zap
since:
1.0
Called when a pig is struck by lightning and transforms into a zombie pigman. Cancel the event to prevent the transformation.
See also: on lightning strike

On Piston Extend

patterns[?]:
[on] piston extend[ing]
since:
1.0
Called when a piston is about to extend.

On Piston Retract

patterns[?]:
[on] piston retract[ing]
since:
1.0
Called when a piston is about to retract.

On Place

patterns[?]:
[on] [block] (plac(e|ing)|build[ing]) [[of] %item types%]
since:
1.0
Called when a player places a block.
examples:
on place
on place of a furnace, workbench or chest

On Portal

patterns[?]:
[on] [player] portal
since:
1.0
Called when a player uses a nether or end portal. Cancel the event to prevent the player from teleporting.

On Portal Create

patterns[?]:
[on] portal create
since:
1.0
Called when a portal is created, either by a player or mob lighting an obsidian frame on fire, or by a nether portal creating its teleportation target in the nether/overworld.
Please note that it's not possible to use the player in this event.

On Portal Enter

patterns[?]:
[on] portal enter
[on] entering [a] portal
since:
1.0
Called when a player enters a nether portal and the swirly animation starts to play.

On Pressure Plate / Trip

patterns[?]:
[on] [step[ping] on] [a] [pressure] plate
[on] (trip|[step[ping] on] [a] tripwire)
since:
1.0 (pressure plate), 1.4.4 (tripwire)
Called when a player steps on a pressure plate or tripwire respectively.

On Projectile Hit

patterns[?]:
[on] projectile hit
since:
1.0
Called when a projectile hits an entity or a block.
Use the damage event with a check for a projectile to be able to use the entity that got hit in the case when the projectile hit a living entity.
A damage event will even be fired if the damage is 0, e.g. when throwing snowballs at non-nether mobs.

On Quit

patterns[?]:
[on] (quit[ting]|disconnect[ing]|log[ ]out|logging out)
since:
1.0
Called when a player leaves the server. Starting with Skript 2.0 this also includes kicked players.

On Redstone

patterns[?]:
[on] redstone [current] [chang(e|ing)]
since:
1.0
Called when the redstone current of a block changes. This event is of not much use yet.

On Region Enter/Leave

patterns[?]:
cannot be used directly
since:
2.1
Called when a player enters or leaves a region.
This event requires a supported regions plugin to be installed.
examples:
on region exit:
	message "Leaving %region%."

On Respawn

patterns[?]:
[on] [player] respawn[ing]
since:
1.0
Called when a player respawns. You should prefer this event over the death event as the player is technically alive when this event is called.

On Script Load/Unload

patterns[?]:
[on] [script] (load|init|enable)
[on] [script] (unload|stop|disable)
since:
2.0
Called directly after the trigger is loaded, or directly before the whole script is unloaded.
examples:
on load:
	set {running.%script%} to true
on unload:
	set {running.%script%} to false

On Shoot

patterns[?]:
[on] [projectile] shoot
since:
1.0
Called whenever a projectile is shot. Use the shooter expression to get who shot the projectile.

On Sign Change

patterns[?]:
[on] sign (chang[e]|edit)[ing]
[on] [player] (chang[e]|edit)[ing] [a] sign
since:
1.0
As signs are placed empty, this event is called when a player is done editing a sign.
examples:
on sign change:
	line 2 is empty
	set line 1 to "<red>%line 1%"

On Skript Start/Stop

patterns[?]:
[on] (server|skript) (start|load|enable)
[on] (server|skript) (stop|unload|disable)
since:
2.0
Called when the server starts or stops (actually, when Skript starts or stops, so a /reload will trigger these events as well).
examples:
on Skript start
on server stop

On Smelt

patterns[?]:
[on] [ore] smelt[ing]
[on] smelt[ing] of ore
since:
1.0
Called when a furnace smelts an item in its ore slot.

On Sneak Toggle

patterns[?]:
[on] [player] toggl(e|ing) sneak
[on] [player] sneak toggl(e|ing)
since:
1.0
Called when a player starts or stops sneaking. Use is sneaking to get whether the player was sneaking before the event was called.
examples:
# make players that stop sneaking jump
on sneak toggle:
	player was sneaking
	push the player upwards at speed 0.5

On Spawn

patterns[?]:
[on] spawn[ing] [of %entity types%]
since:
1.0
Called when an creature spawns.
examples:
on spawn of a zombie
on spawn of an ender dragon:
	broadcast "A dragon has been sighted in %world%!"

On Spawn Change

patterns[?]:
[on] [world] spawn change
since:
1.0
Called when the spawn point of a world changes.

On Spread

patterns[?]:
[on] spread[ing]
since:
1.0
Called when a new block forms as a result of a block that can spread, e.g. water or mushrooms.

On Sprint Toggle

patterns[?]:
[on] [player] toggl(e|ing) sprint
[on] [player] sprint toggl(e|ing)
since:
unknown
Called when a player starts or stops sprinting. Use is sprinting to get whether the player was sprinting before the event was called.

On Tame

patterns[?]:
[on] [entity] tam(e|ing)
since:
1.0
Called when a player tames a wolf or ocelot. Can be cancelled to prevent the entity from being tamed.

On Target

patterns[?]:
[on] [entity] target
[on] [entity] un[-]target
since:
1.0
Called when a mob starts/stops following/attacking another entity, usually a player.
Please note that even though the target expression also works for a player's target this event is not called for players.

On Teleport

patterns[?]:
[on] [player] teleport[ing]
since:
1.0
Called whenever a player is teleported, either by a nether/end portal or other means (e.g. by plugins).

On Throwing of an Egg

patterns[?]:
[on] throw[ing] [of] [an] egg
[on] [player] egg throw
since:
1.0
Called when a player throws an egg. You can just use the shoot event in most cases, as this event is intended to support changing the hatched mob and its chance to hatch, but Skript does not yet support that.

On Tool Change

patterns[?]:
[on] [player['s]] (tool|item held|held item) chang(e|ing)
since:
1.0
Called whenever a player changes his held item by selecting a different slot (e.g. the keys 1-9 or the mouse wheel), but not by dropping or replacing the item in the current slot.

On Vehicle Create

patterns[?]:
[on] vehicle create
[on] creat(e|ing|ion of) [a] vehicle
since:
1.0
Called when a new vehicle is created, e.g. when a player places a boat or minecart.

On Vehicle Damage

patterns[?]:
[on] vehicle damage
[on] damag(e|ing) [a] vehicle
since:
1.0
Called when a vehicle gets damage. Too much damage will destroy the vehicle.

On Vehicle Destroy

patterns[?]:
[on] vehicle destroy
[on] destr(oy[ing]|uction of) [a] vehicle
since:
1.0
Called when a vehicle is destroyed. Any passenger will be ejected and the vehicle might drop some item(s).

On Vehicle Enter

patterns[?]:
[on] vehicle enter
[on] enter[ing] [a] vehicle
since:
1.0
Called when an entity enters a vehicle, either deliberately (players) or by falling into them (mobs).

On Vehicle Exit

patterns[?]:
[on] vehicle exit
[on] exit[ing] [a] vehicle
since:
1.0
Called when an entity exits a vehicle.

On Weather Change

patterns[?]:
[on] weather change [to %weather types%]
since:
1.0
Called when a world's weather changes.
examples:
on weather change
on weather change to sunny

On World Init

patterns[?]:
[on] world init
since:
1.0
Called when a world is initialised. As all default worlds are initialised before any scripts are loaded, this event is only called for newly created worlds.
World management plugins might change the behaviour of this event though.

On World Load

patterns[?]:
[on] world load[ing]
since:
1.0
Called when a world is loaded. As with the world init event, this event will not be called for the server's default world(s).

On World Save

patterns[?]:
[on] world sav(e|ing)
since:
1.0
Called when a world is saved to disk. Usually all worlds are saved simultaneously, but world management plugins could change this.

On World Unload

patterns[?]:
[on] world unload[ing]
since:
1.0
Called when a world is unloaded. This event might never be called if you don't have a world management plugin.

On Zombie Break Door

patterns[?]:
[on] zombie break[ing] [a] [wood[en]] door
since:
unknown
Called when a zombie is done breaking a wooden door. Can be cancelled to prevent the zombie from breaking the door.

Periodical

patterns[?]:
every %time span% in [world[s]] %worlds%
since:
1.0
An event that is called periodically. The event is used like 'every <timespan>', e.g. 'every second' or 'every 5 minutes'.
examples:
every second
every minecraft hour
every tick # warning: lag!
every minecraft day in "world"