Season 8 Dates:

What
When
Season 8 Signups Close
28th of October 2018 midnight (CEST for EU, PST for NA)
Season 8 Rigging
29th of October 2018
Season 8 Round 1 starts
12th of November 2018
Season 8 Holiday break
24th of December 2018 - 30th of December 2018

Season 1 NA:

What
When
Season 1 Last round (round 8) starts
14th of January
Season 1 Last day regular games can be played 
26th of January
Season 1 Tiebreakers
-
Season 1 Draw show
27th of January
Season 1 Playoffs start
28st of January
Season 1 Playoffs end
17rd of February
Mythic Championship Group Stage - Division 1
27th of January - 16th of February
Legendary Cup Group Stage - Divisions 2 & 3 27th of January - 9th of February
Epic Cup Group Stage - Divisions 4 & 5 27th of January - 8th of February
Epic Cup Finals - Divisions 4 & 5 9th of February
Legendary Cup Finals - Divisions 2 & 3
10th of February
Mythic Championship Finals - Division 1
17th of February

Season 8 EU:

What
When
Season 8 Last round (round 10) starts
21st of January
Season 8 Last day regular games can be played 
2nd of February
Season 8 Tiebreakers
-
Season 8 Draw show
3rd of February
Season 8 Playoffs start
4th of February
Season 8 Playoffs end
3rd of March
Mythic Championship Group Stage - Division 1
3rd of February - 28th of February
Legendary Cup Group Stage - Divisions 2 & 3
3rd of February - 28th of February
Epic Cup Group Stage - Divisions 4 & 5
3rd of February - 21st of February
Rare Cup Group Stage - Divisions 6 & 7 3rd of February - 21st of February
Rare Cup Finals - Divisions 6 & 7
23rd of February
Epic Cup Finals - Divisions 4 & 5
24th of February
Legendary Cup Finals - Divisions 2 & 3
2nd of March
Mythic Championship Finals - Division 1
3rd of March


Season 2 NA:

What
When
Signups Open 3rd of February 1pm EST/11am PST
Signups Close 24th of March (11:59pm PST/1:59am CET)
Rigging  25th of March
Round 1 starts 8th of April
Last round (10) starts 10th of June
Last date to play regular season games 22nd of June
Draw Show 23rd of June
Playoff Group Stage starts 24th of June
Playoffs end 14th of July

Season 9 EU:

What
When
Signups Open
3rd of February 19:00 CET
Signups Close
10th of March (23:59CET)
Rigging
11th of March
Round 1 starts
25th of March
Last round (10) starts
27th of May
Last date to play regular season games
8th of June
Draw Show
9th of June
Playoff Group Stage starts
10th of June
Playoffs end
30th of June