Jon Stewart -- who originally hosted the show from 1999 to 2015 -- is headed back to Comedy Central to host 'TDS' ... but only on Mondays. From Tuesday-Thursday, fans will see some of their fav correspondents helm the show.

The part-time hosting gig doesn't mean Jon will be kicking back during the rest of the week -- he's also returning as executive producer for every episode from now through 2025 -- so it looks like he'll be sticking around for a bit.

Not only was Stewart host and EP of the show for more than 15 years, but he mentored some of the biggest names in comedy while heading up the program.

Just check out the roster ... Stephen Colbert, Trevor Noah, Samantha Bee, John Oliver, Steve Carell, Ed Helms, Olivia Munn, Hasan Minhaj and Josh Gad just to name a few. Talk about one hell of a coaching tree!

It's probably a good time for JS to head back to his old stompin' ground ... 'cause his latest television venture, "The Problem with Jon Stewart" didn't go so well.

Apple TV+ canceled Stewart's show in October after a little over 2 years, and The New York Times reported the comedian butted heads with Apple execs on show topics and guests.

And remember, "The Daily Show" hasn't fared much better ... they've been working with a rotating cast of guest hosts for more than a year since Trevor stepped down from the role -- culminating in a funny/awkward moment at this year's Emmys where former correspondent Roy Wood Jr. basically pled with execs in the crowd to "please hire a host."

Not exactly the permanent solution Roy was looking for, but definitely a step in the right direction.