WatchTillTandava said:Yup, it's Wednesday, as others have said. I know because it's the series I always most look forward to on Wednesdays now (even slightly more than Heike Monogatari, but substantially more than Puroare! Pride of Orange).
The broadcast times are almost always added and updated as needed on the series' main pages in the MAL database as well. You can find this one also on its main MAL page.
It is listed as: "Broadcast: Wednesdays at 22:30 (JST) "
If you care about the specific time as well and aren't in Japan, then what that time in JST actually means to you is something you'll have to convert based on timezone. For instance, I'm in the northeast of the U.S. in EST (Eastern Standard Time), so the time in JST in Japan (Japan Standard Time) is always either 13 or 14 hours apart and ahead, depending on the time of year (Daylight Savings Time-based discrepancies).
You should also consider using this website's chart as a resource. I've been using it to check back periodically to remind myself of the airing days (not so much the times, as that's kind of irrelevant information anyway since I don't watch it live or the moment it drops or anything) since I've never watched this many seasonals so it can be very easy to forget or mix up the specific airing days of some:
Anime Airing Schedule, Fall 2021:
https://animeschedule.net/
Thanks for the link!