"Sat, 21 Dec 2024 14:21:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
14:21:21
General datetime
2024-12-21 14:21:21Z
For Database
2024-12-21 14:21:21
For HTTP1.1
Sat, 21 Dec 2024 14:21:21 GMT