Wikipedia:WikiCalendar

This is calendar showing scheduled events on English Wikipedia, and some major events elsewhere in the Wikimedia community that can be expected to have reasonably engagement by EnWiki editors.

Q4 2026
Type		Month and week date
		October						November						December
		40	41	42		43	44		45	46	47		48		49	50		51	52
Special events								The Asia–Oceania Destubathon
Edit-a-thons								Asian Month
Backlog drive		Good article nominations						Unreferenced articles
Backlog drive								Copy editing
Elections		Admin Election						ArbCom Election
Project events	WiR	Women in STEM										16 Days of Activism
	WiR	Award winners
	GoCE				Blitz												Blitz
	Other
Wikimedia		Wiki Loves Peace (Commons)

Q1 2027
Type		Month and week date
		January						February							March
		53	1	2	3	4	5		6	7		8	9			10	11	12	13
Special events
Edit-a-thons
Backlog drive		Copy editing						Good article nominations							Copy editing
Backlog drive								Unreferenced articles
Elections														Admin Election
Project events	WiR
	GoCE										Blitz
	Other
Wikimedia

Details

Extended editing efforts, such as year-long themes or competitions that happen every month, are not listed.
"Special events" are wiki-wide events that cannot be classified as edit-a-thons, backlog drives nor elections.
Backlog drives go under "Backlog drives" regardless of whether a WikiProject is organizing it, as they are effectively wiki-wide and it is useful to bunch them together.
"Elections" is only for EnWiki ones; Wikimedia ones go under "Wikimedia".
Events run wholly within WikiProjects go under "Project events".
"Misc" is, as one might expect, for anything that is useful to have on the calendar but which does not fit into other categories.
"Wikimedia" is for major events on other Wikimedia projects that can be reasonably expected to be relevant to EnWiki editors.

1 2 Began in September.
↑ The end-date is an estimate based on last election; how fast the scruts are determines when the election officially ends.
↑ The full title of the edit-a-thon is 16 Days of Activism against Gender-based Violence (as in the real-life event that is the theme of the edit-a-thon).

[Sep-1] 1 2 Began in September.

[2] The end-date is an estimate based on last election; how fast the scruts are determines when the election officially ends.

[3] The full title of the edit-a-thon is 16 Days of Activism against Gender-based Violence (as in the real-life event that is the theme of the edit-a-thon).