"Sat, 21 Dec 2024 08:40:44"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
08:40:44
General datetime
2024-12-21 08:40:44Z
For Database
2024-12-21 08:40:44
For HTTP1.1
Sat, 21 Dec 2024 08:40:44 GMT