Calendar & Events API (Retail — Patch 12.0.0)

Comprehensive reference for the in-game calendar and event scheduler.

Source: https://warcraft.wiki.gg/wiki/World_of_Warcraft_API Current as of: Patch 12.0.0 (Build 65655) — January 28, 2026 Scope: Retail only.

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Scope

• C_Calendar — Full calendar system (50+ functions)
• C_EventScheduler — Scheduled event management

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C_Calendar — Calendar System

Opening & Navigation

Function	Returns	Description
C_Calendar.OpenCalendar()	—	Open/initialize calendar
C_Calendar.CloseEvent()	—	Close event editor
C_Calendar.SetAbsMonth(month, year)	—	Navigate to month
C_Calendar.SetMonth(offsetMonths)	—	Navigate relative
C_Calendar.GetMonthInfo(offsetMonth)	monthInfo	Month data
C_Calendar.GetMinDate()	date	Earliest navigable date
C_Calendar.GetMaxDate()	date	Latest navigable date

Month Info Fields

• month — Month number (1-12)
• year — Year
• numDays — Days in month
• firstWeekday — First day weekday (1=Sun)

Day Events

Function	Returns	Description
C_Calendar.GetNumDayEvents(offsetDay, monthOffset)	numEvents	Events on day
C_Calendar.GetDayEvent(offsetDay, eventIndex, monthOffset)	eventInfo	Event at index
C_Calendar.GetNumGuildEvents()	numEvents	Guild events
C_Calendar.GetGuildEventInfo(index)	eventInfo	Guild event

Event Info Fields

• title — Event title
• isCustomTitle — Player-created?
• startTime — Start date/time
• endTime — End date/time
• calendarType — Type (PLAYER, GUILD_EVENT, SYSTEM, HOLIDAY, RAID_LOCKOUT, etc.)
• sequenceType — Sequence (START, ONGOING, END)
• eventType — Event type enum
• texture — Event texture
• modStatus — Moderator status
• inviteStatus — Invite status enum
• invitedBy — Who invited
• difficulty — Difficulty ID
• inviteType — Invite type
• sequenceIndex — Sequence index
• numSequenceDays — Total sequence days
• difficultyName — Difficulty name
• isLocked — Locked?

Creating & Editing Events

Function	Returns	Description
C_Calendar.CreatePlayerEvent()	—	Start creating event
C_Calendar.CreateGuildAnnouncement()	—	Create guild announcement
C_Calendar.CreateGuildSignUpEvent()	—	Create sign-up event
C_Calendar.CreateCommunitySignUpEvent()	—	Community sign-up event
C_Calendar.AddEvent()	—	Submit new event
C_Calendar.UpdateEvent()	—	Update edited event
C_Calendar.RemoveEvent()	—	Delete event
C_Calendar.OpenEvent(offsetDay, eventIndex, monthOffset)	—	Open event for viewing
C_Calendar.CanAddEvent()	canAdd	Can create events?

Event Properties (Get/Set)

Function	Returns	Description
C_Calendar.EventGetTitle()	title	Get event title
C_Calendar.EventSetTitle(title)	—	Set event title
C_Calendar.EventGetDescription()	description	Get description
C_Calendar.EventSetDescription(desc)	—	Set description
C_Calendar.EventGetDate()	date	Get event date
C_Calendar.EventSetDate(month, day, year)	—	Set event date
C_Calendar.EventGetTime()	hour, minute	Get event time
C_Calendar.EventSetTime(hour, minute)	—	Set event time
C_Calendar.EventGetType()	eventType	Get event type
C_Calendar.EventSetType(eventType)	—	Set event type
C_Calendar.EventGetRepeatOption()	repeatOption	Repeat setting
C_Calendar.EventSetRepeatOption(option)	—	Set repeat
C_Calendar.EventGetLocked()	isLocked	Is locked?
C_Calendar.EventSetLocked(locked)	—	Lock/unlock
C_Calendar.EventGetClubId()	clubId	Associated club
C_Calendar.EventSetClubId(clubId)	—	Set club

Invites

Function	Returns	Description
C_Calendar.EventGetNumInvites()	numInvites	Invite count
C_Calendar.EventGetInvite(index)	inviteInfo	Invite data
C_Calendar.EventInvite(name)	—	Invite player
C_Calendar.EventRemoveInvite(index)	—	Remove invite
C_Calendar.EventSetInviteStatus(index, status)	—	Set invite status
C_Calendar.EventSignUp()	—	Sign up
C_Calendar.EventDecline()	—	Decline
C_Calendar.EventTentative()	—	Tentative
C_Calendar.EventAvailable()	—	Mark available
C_Calendar.MassInviteGuild(minLevel, maxLevel, maxRank)	—	Mass guild invite
C_Calendar.MassInviteCommunity(clubId, minLevel, maxLevel)	—	Mass community invite
C_Calendar.GetEventInviteResponseTime(index)	time	Response time
C_Calendar.EventSortInvites(sortType, reverse)	—	Sort invites
C_Calendar.EventCanEdit()	canEdit	Can edit event?

Invite Status Enums

Value	Status
1	Invited
2	Accepted
3	Declined
4	Confirmed
5	Out
6	Standby
7	Signed Up
8	Not Signed Up
9	Tentative

Holidays

Function	Returns	Description
C_Calendar.GetHolidayInfo(offsetDay, eventIndex, monthOffset)	holidayInfo	Holiday data
C_Calendar.GetNumHolidayTextures(offsetDay, eventIndex, monthOffset)	numTextures	Holiday textures

Filtered Events

Function	Returns	Description
C_Calendar.SetTextureToDefault()	—	Reset texture filter
C_Calendar.GetDefaultGuildFilter()	filter	Default guild filter
C_Calendar.EventGetTextures()	textures	Event textures
C_Calendar.EventGetSelectedInvite()	index	Selected invite
C_Calendar.EventSetSelectedInvite(index)	—	Select invite

Raid Resets

Function	Returns	Description
C_Calendar.GetNumRaidResets()	numResets	Raid reset count
C_Calendar.GetRaidReset(index)	resetInfo	Reset info

Event Type Textures

Function	Returns	Description
C_Calendar.GetEventTypeTexture(eventType)	texture	Texture for type
C_Calendar.EventGetTypesDisplayOrdered()	types	Ordered event types

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C_EventScheduler — Scheduled Events

Function	Returns	Description
C_EventScheduler.GetScheduledEvents()	events	All scheduled events
C_EventScheduler.GetEventInfo(eventID)	eventInfo	Event details
C_EventScheduler.IsEventActive(eventID)	isActive	Event active?

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Common Patterns

List Today's Events

C_Calendar.OpenCalendar()

local monthInfo = C_Calendar.GetMonthInfo(0)
local today = tonumber(date("%d"))

local numEvents = C_Calendar.GetNumDayEvents(today, 0)
for i = 1, numEvents do
    local event = C_Calendar.GetDayEvent(today, i, 0)
    if event then
        print(event.title, "-", event.calendarType)
    end
end

Create a Guild Event

C_Calendar.CreateGuildSignUpEvent()
C_Calendar.EventSetTitle("Raid Night - Mythic")
C_Calendar.EventSetDescription("Bring flasks and food.")
C_Calendar.EventSetDate(3, 15, 2026) -- March 15, 2026
C_Calendar.EventSetTime(20, 0) -- 8:00 PM
C_Calendar.EventSetType(1) -- Raid type
C_Calendar.AddEvent()

Check Upcoming Holidays

C_Calendar.OpenCalendar()
local monthInfo = C_Calendar.GetMonthInfo(0)

for day = 1, monthInfo.numDays do
    local numEvents = C_Calendar.GetNumDayEvents(day, 0)
    for i = 1, numEvents do
        local event = C_Calendar.GetDayEvent(day, i, 0)
        if event and event.calendarType == "HOLIDAY" then
            print("Holiday:", event.title, "- Day", day)
        end
    end
end

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Key Events

Event	Payload	Description
CALENDAR_UPDATE_EVENT_LIST	—	Event list changed
CALENDAR_UPDATE_INVITE_LIST	hasCompleteList	Invite list changed
CALENDAR_NEW_EVENT	isCopy	Creating new event
CALENDAR_OPEN_EVENT	calendarType	Event opened
CALENDAR_CLOSE_EVENT	—	Event closed
CALENDAR_UPDATE_EVENT	—	Event data changed
CALENDAR_UPDATE_PENDING_INVITES	—	Pending invites changed
CALENDAR_EVENT_ALARM	title, hour, minute	Event alarm
CALENDAR_ACTION_PENDING	pending	Action in progress
CALENDAR_UPDATE_GUILD_EVENTS	—	Guild events updated
CALENDAR_UPDATE_ERROR	errorReason	Calendar error

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Gotchas & Restrictions

1. OpenCalendar() required — Must call C_Calendar.OpenCalendar() before using other calendar functions.
2. Offset-based navigation — Day and month parameters are offsets from current, not absolute (for most functions).
3. Invite permissions — Only event owners/moderators can manage invites.
4. Calendar types — calendarType distinguishes PLAYER events from HOLIDAY, SYSTEM, RAID_LOCKOUT, etc.
5. Mass invite limits — Guild/community mass invites have level and rank filters.
6. Event creation requires hardware — AddEvent() typically requires user interaction.
7. Holiday info is read-only — Holidays are system-generated and cannot be modified.
8. Calendar data is async — Wait for CALENDAR_UPDATE_EVENT_LIST after opening the calendar.