"Sat, 21 Dec 2024 19:42:11"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
19:42:11
General datetime
2024-12-21 19:42:11Z
For Database
2024-12-21 19:42:11
For HTTP1.1
Sat, 21 Dec 2024 19:42:11 GMT