"Sat, 21 Dec 2024 19:36:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
19:36:20
General datetime
2024-12-21 19:36:20Z
For Database
2024-12-21 19:36:20
For HTTP1.1
Sat, 21 Dec 2024 19:36:20 GMT