Season 9 EU:

What	When
Season 9 [EU] Signups Open	3rd of February (19:00 CET)
Season 9 [EU] Signups Close	10th of March (23:59 CET)
Season 9 [EU] Seeding	11th of March
Season 9 [EU] Round 1 starts	25th of March
Season 9 [EU] Last round (10) starts	27th of May
Season 9 [EU] Last date to play regular season games	7th of June
Season 9 [EU] Draw Show	9th of June
Season 9 [EU] Playoff Group Stage starts	10th of June
Season 9 [EU] Playoffs end	30th of June

Season 2 NA:

What	When
Season 2 [NA] Signups Open	3rd of February (2:00 pm EST/11:00 am PST)
Season 2 [NA] Signups Close	24th of March (11:59 pm EST/8:59 am PST)
Season 2 [NA] Seeding	25th of March
Season 2 [NA] Round 1 starts	8th of April
Season 2 [NA] Last round (10) starts	10th of June
Season 2 [NA] Last date to play regular season games	21st of June
Season 2 [NA] Draw Show	23rd of June
Season 2 [NA] Playoff Group Stage starts	24th of June
Season 2 [NA] Playoffs end	14th of July