The new shorts, created by French animation studio Normaal Animation, first aired in France in 2014 and 2015. Each short is based on a comic strip by Charles Schulz, and are drawn in a traditional 2D animation style, unlike the recent theatrical "Peanuts" movie. According to the PR, the shorts were designed to feel like the comic strips they are based on, with "watercolor art style, textured backgrounds and framing." According to Normaal, they created 500 of these shorts (!!), each about 1-2 minutes long.
(Back in December 2014, the Los Angeles Times ran a nice article about the shorts, which you can read here.)
The shorts have been re-dubbed in English by child actors who auditioned for parts in last year's "Peanuts" movie and who were rated highly, but didn't quite make the cut for the movie. Based on the few shorts that have aired so far, they seem up to the task!
For the American broadcast, the shorts have been grouped together into 104 different approximately 7-minute "episodes." Two of those 7-minute episodes will air together each day. During the first week of broadcast (May 9-13), Boomerang aired two new blocks a day. As of the start of the second week (Monday May 16), while they are still airing two blocks, only the first block is new, and second block is a repeat. According to advance schedules, that will be the pattern through at least Friday May 27. So it will be a while before all 104 blocks air!
Some of the individual 1-2 minute shorts are also airing sporadically whenever Boomerang has some time to fill. It's expected that all those shorts will also air as part of the daily 15-minute blocks.
For the first week only - Monday May 9 through Friday May 15 - the shorts aired as a "preview" on the more widely available Cartoon Network channel, from 10:00 - 10:15 AM Eastern (7:00 - 7:15 AM Pacific). Alas, as of Monday May 16, the shorts are only airing on Boomerang.
If you're setting up your DVR to record the shows, check the times carefully - initially some program guides had an incorrect length listed for the broadcasts. They are, in fact, only 15 minutes long. Also, so far Boomerang has often started the episodes several minutes early at 11:27 AM - so you should to tell your device to start recording 5 minutes early (and to keep going for a few extra minutes later, too).
On YouTube, you can see Boomerang's 60-second promo spot for the new Peanuts shorts, and you can find several samples of the shorts themselves on Normaal's website.
Be sure to tune in and check out this latest adaptation of the Peanuts gang!