The Addition of Day 1d Creates a Day 2b
The original schedule showed three Day Ones but only one Day Two. Everyone who survived their first day would combine into a single field on Tuesday. (Monday was originally an off day.)
Now that there are four Day Ones, there will be two Day Twos. So everyone who survived Day 1a and Day 1b will play on Tuesday, just as expected. But then they'll have Wednesday off (if they survive Tuesday).
The end of the Main Event schedule is unchanged, and there will still be an off day before the final table. But here's a summary.
Tuesday - Day 2a - Survivors from Day 1a and 1b play.
Wednesday - Day 2b - Survivors from Day 1c and 2d play.
Thursday - Day 3 - Everyone plays.
If you're playing on Tuesday, you have Wednesday off, and vice versa.