"Sat, 21 Dec 2024 20:21:59"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
20:21:59
General datetime
2024-12-21 20:21:59Z
For Database
2024-12-21 20:21:59
For HTTP1.1
Sat, 21 Dec 2024 20:21:59 GMT