"Mon, 19 Jan 1970 07:51:46"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700119
Only TIME
07:51:46
General datetime
1970-01-19 07:51:46Z
For Database
1970-01-19 07:51:46
For HTTP1.1
Mon, 19 Jan 1970 07:51:46 GMT