"Sat, 15 Jun 2024 23:45:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
23:45:47
General datetime
2024-06-15 23:45:47Z
For Database
2024-06-15 23:45:47
For HTTP1.1
Sat, 15 Jun 2024 23:45:47 GMT