Command to retrieve Easter time and related holidays.
usage: computus [-h] [-v] [-c] [-a] [-p] [-e] [-w] [year]
arguments:
-h, --help show this help message and exit.
-v, --version show program's version number and exit.
-c, --carnival Carnival time.
-a, --ash Ash Wednesday.
-p, --palm Palm Sunday.
-e, --easter Easter.
-w, --holyweek Holy Week.
year Any year number since 1583.