"Sat, 20 Jul 2024 18:38:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240720
Only TIME
18:38:20
General datetime
2024-07-20 18:38:20Z
For Database
2024-07-20 18:38:20
For HTTP1.1
Sat, 20 Jul 2024 18:38:20 GMT