epoch Prime

[pier4r]

Well epoch is from the 1st Jan 1970 00.00 if I am not mistaken.

Now -> epoch
Then one has to count the days until today, caring for leap years.
(this means caring also on the various lengths of different months)
Once one has the days. Days*86400 plus the seconds passed today.

date ->epoch
Same thing as above, but assuming that "now" is date.

epoch-> date
take the epoch and check how many days it fits.
Then check how many of those days fit years (considering leap years).
Then check how the rest of the days (after one has the number of years) fits in months (considering the different length of months).
Then once one has the remaining days , while year and month are identified, find the day and the hour.

The tedious (but crucial) part would be: leap years algorithm and months definition.

Timezone. Nah, too much work: https://en.wikipedia.org/wiki/List_of_tz...time_zones.
UTC and then the user can do a sum or subtraction alone.