According to zap2it, they're burning off Big Nate episodes on Nicktoons network airing around 8:30pmish or 9pmish. It's off the clock.
Starts with last 2 episodes of season 1 that Nickelodeon has NOT aired:
The Big Freeze and Wait Until Dark.
Then first batch of season 2 episodes will continue to air on Nicktoons. Season 2 is airing in production order.
Mon Mar 11 8:54pm - The Big Freeze
Mon Mar 11 9:23pm - Wait Until Dark (season 1 finale the show overall)
Tues Mar 12 8:54pm - The Curse of Eewcorpico, Part 1 (season 2 premiere)
Wed Mar 13 8:54pm - The Curse of Eewcorpico, Part 2
Thurs Mar 14 8:54pm - Bum Rap
Fri Mar 15 8:54pm - Nate Wright's Day Off
Mon Mar 18 9:21pm - Mouth Bro Madness
Mon Mar 18 9:49pm - A Star is Torn
Tues Mar 19 9:21pm - Valentine's Day of Horror: Chapter II
Wed Mar 20 9:21pm - Flavor Blasted Beardy Yum Yums
Thurs Mar 21 9:21pm - Rackleff's G.O.A.T.
Fri Mar 22 9:21pm - Ballad of Big Nate (mid season 2 finale)
Don't know yet, if season 2 on Mar 25 will continue to burnoff.. just like Rugrats (2021) season 2 are doing later on? Since Mar 25 week is a placeholder for Nicktoons schedule