Scrapes NOTAM tower opening hours for EFJY from the Finavia bulletin and formats it as iCalendar which can used for example with Google Calendar.
Install node.js, npm and GNU Make.
Install deps
make
Generate iCalendar file to stdout from the current bulletin
make scrape
Generate to file
make scrape > tower.ical
Here's daily generated .ical file for EFJY:
http://skydivejkl.fi/finavia-bulletin-scraper/efjy.ical
and as Google Calendar: