>If someone knows an elegant way to calculate the number of days from > time periods in groff, I'd be very thankful.
How about something like this:
.PS 5i
define days { line right $1 }
jan = 31
feb = 28
mar = 31
apr = 30
may = 31
...
define tick { line up 1
$1 at last line.s below }
tick("3/15")
days(mar-15+apr+may+5)
tick("6/5")
.PE
