"Sat, 15 Jun 2024 18:21:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240615
Only TIME
18:21:48
General datetime
2024-06-15 18:21:48Z
For Database
2024-06-15 18:21:48
For HTTP1.1
Sat, 15 Jun 2024 18:21:48 GMT