Organized by Month
January 22, 2061 – Scott Summer’s Inauguration – 100th Anniversary X-Men
January 23, 1984 – the date of Senator Kelly’s mutant registration act – Uncanny X-Men 181
February 27, 2002 – the date Nightcrawler is to turn in his homework – X-Men Evolution 4
March 8 – the day humans disappeared – X-Men : No More Humans
June 21, 2007 – Ian McNee first notices his Tarot cards are acting unusual – Marvel Tarot
July 7, 2007 – Ian McNee figures out his Tarot is broken and starts researching it – Marvel Tarot
August 20 – Kitty’s First Day for – Getting her dorm the way she like, the first time she realized she had a crush on Colossus and first day of classes – Wolverine First Class 1
September 1, 1980 – the day Jean Grey died (the first time) – Uncanny X-Men 172
October 7, 2005 – Kate Pryde is arrested with her fellow X-Men – Excalibur 66
October 8, 2005 – Kate Pryde is sentenced to life in the concentration camps – Excalibur 66
October 31, 1980 – the present day of Days of Future Past – Uncanny X-Men 141
November 9, 1945 – the date Dire Wraiths used as their birthdays – ROM Spaceknight 17
December, 2013 – the month and year of the Present Day – Avengers Volume Five Issue 24
. . .
I will update the list as I learn more dates. I know it probably would be nicer to have it as the actual dates but then dates like No More Humans where there is no listed year, confuses things. Plus this way, I can quickly look at the list and see if I need to do something fun or interesting for that date.
If you know any others, let me know! It doesn’t necessarily have to be X-Men related.