"Sat, 21 Dec 2024 19:40:16"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
19:40:16
General datetime
2024-12-21 19:40:16Z
For Database
2024-12-21 19:40:16
For HTTP1.1
Sat, 21 Dec 2024 19:40:16 GMT