"Sat, 21 Sep 2024 15:09:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
15:09:09
General datetime
2024-09-21 15:09:09Z
For Database
2024-09-21 15:09:09
For HTTP1.1
Sat, 21 Sep 2024 15:09:09 GMT