is_nighttime - Exit status of true if it is currently nighttime
is_nighttime [-v] [-f FILE] is_nighttime && echo 'It is Nighttime!'
Specify alternate configuration file
Uses the system coordinates as configured from the perl package Geo::Local::Server and with the perl package DateTime::Event::Sunrise calculates the next sunset and sunrise to determine if it is currently daytime or nighttime
The exit status is 0 if it is nighttime. The exit status is 1 if it is daytime.