"Sat, 21 Dec 2024 19:40:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241221
Only TIME
19:40:18
General datetime
2024-12-21 19:40:18Z
For Database
2024-12-21 19:40:18
For HTTP1.1
Sat, 21 Dec 2024 19:40:18 GMT