"Sat, 21 Sep 2024 15:39:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240921
Only TIME
15:39:18
General datetime
2024-09-21 15:39:18Z
For Database
2024-09-21 15:39:18
For HTTP1.1
Sat, 21 Sep 2024 15:39:18 GMT