"Sat, 21 Dec 2024 17:42:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
17:42:12
General datetime
2024-12-21 17:42:12Z
For Database
2024-12-21 17:42:12
For HTTP1.1
Sat, 21 Dec 2024 17:42:12 GMT