"Sat, 15 Jun 2024 08:54:30"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
08:54:30
General datetime
2024-06-15 08:54:30Z
For Database
2024-06-15 08:54:30
For HTTP1.1
Sat, 15 Jun 2024 08:54:30 GMT