Calendar files

iCalendar duration parser

Parse signed iCalendar durations and show their nominal seconds.

Your inputs

Start with an example

Example result

Accept weeks, or days followed by hours/minutes/seconds. Normalize with seven days per week and 24 hours per day.

P1DT2H3M4S = 86400 + 7200 + 180 + 4 = 93784 nominal seconds.

No months, years or fractional seconds. Days and weeks can span daylight-saving changes; nominal seconds are not timezone-aware date addition.