"Sat, 07 Feb 1970 02:46:46"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700207
Only TIME
02:46:46
General datetime
1970-02-07 02:46:46Z
For Database
1970-02-07 02:46:46
For HTTP1.1
Sat, 07 Feb 1970 02:46:46 GMT