"Sat, 18 May 2024 18:15:05"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20240518
Only TIME
18:15:05
General datetime
2024-05-18 18:15:05Z
For Database
2024-05-18 18:15:05
For HTTP1.1
Sat, 18 May 2024 18:15:05 GMT