"Sun, 22 Feb 1970 18:16:05"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700222
Only TIME
18:16:05
General datetime
1970-02-22 18:16:05Z
For Database
1970-02-22 18:16:05
For HTTP1.1
Sun, 22 Feb 1970 18:16:05 GMT