"Sat, 21 Dec 2024 09:15:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
09:15:36
General datetime
2024-12-21 09:15:36Z
For Database
2024-12-21 09:15:36
For HTTP1.1
Sat, 21 Dec 2024 09:15:36 GMT