"Sun, 25 Jan 1970 04:34:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700125
Only TIME
04:34:23
General datetime
1970-01-25 04:34:23Z
For Database
1970-01-25 04:34:23
For HTTP1.1
Sun, 25 Jan 1970 04:34:23 GMT