"Sat, 07 Feb 1970 22:40:45"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700207
Only TIME
22:40:45
General datetime
1970-02-07 22:40:45Z
For Database
1970-02-07 22:40:45
For HTTP1.1
Sat, 07 Feb 1970 22:40:45 GMT