This count starts at the unix epoch on january 1st 1970 at utc.
Unix timestamp wall clock.
Similar to the y2k problem the year 2038 problem is caused by insufficient.
The unix time stamp is a way to track time as a running total of seconds.
Webkit chrome timestamp unix hex timestamp cocoa core data timestamp mac hfs timestamp sas timestamp seconds days since year 0 bin oct hex converter countdown in seconds epoch clock.
To compare two dates in bash you can use the unix timestamp value of both date using the date command line or the printf method and a bash if statement with a bash arithmetic expansion or by using a lexicographical comparison of the two dates string by using the double square bracket conditional construct.
Week numbers weeks by year day numbers days by year years leap years calculate the difference between two dates.