Delete Holidays from Android Calendar

# delete all imported holidays from Android Calendar

# set database - this will change depending on which app you use
db="/data/data/org.fossify.calendar/databases/events.db"

#backup original db
cp $db /sdcard/events_$(date +%Y-%m-%d).db

# list calendars
sqlite3 $db "select source from events" |sort -u

# Holidays will be under 'imported-ics'
# check and make sure that is only holidays
sqlite3 $db "select title from events where source='imported-ics'"

# once confirmed, delete all events from that calendar
sqlite3 $db "DELETE FROM events WHERE source='imported-ics'"