Season 7 Dates:

What When
Season 7 Champ Group Stage
1st - 19th October 2018
Season 7 Champ Weekend
20th - 21st October 2018

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 8 NA:

What
When
Season 8 Last round (round 8) starts
14th of January
Season 8 Last day regular games can be played 
25th of January
Season 8 Tiebreakers
26th & 27th of January
Season 8 Draw show
27th of January
Season 8 Playoffs start
28st of January
Season 8 Playoffs end
17rd 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 
1st of February
Season 8 Tiebreakers
2nd & 3rd of February
Season 8 Draw show
3rd of February
Season 8 Playoffs start
4th of February
Season 8 Playoffs end
3rd of March