GSRC broadcast feed (gsrc.gg)

  https://feed.gsrc.gg/v1/now.json
  https://feed.gsrc.gg/v1/schedule.json   ?series=<slug>&status=upcoming,live,replay
  https://feed.gsrc.gg/v1/schedule.ics
  https://feed.gsrc.gg/v1/series/<slug>.ics
  https://feed.gsrc.gg/health

Times are UTC (ISO 8601). Source: the GSRC staffing calendar, refreshed every 5 min.