Eastern and Oriental Orthodox
Margoneetho: Syriac Orthodox Resources
http://sor.cua.edu/Calendar/index.html
Western
Is Ascension Thursday a Holy Day of Obligation?
http://catholicism.about.com/od/holydaysandholidays/f/Ascension_Holy.htmWayback Machine - Wikipedia
https://en.wikipedia.org/wiki/Wayback_MachineThe Spectator
https://web.archive.org/web/20081203233429/http://www.spectator.co.uk/the-magazine/the-week/658911/part_2/the-spectators-notes.thtmlhttp://www.spectator.co.uk/the-magazine/the-week/658911/part_2/the-spectators-notes.thtml
http://www.spectator.co.uk/the-magazine/the-week/658911/part_2/the-spectators-notes.thtmlhttp://www.stclouddiocese.org/worship/transfer.htm
http://www.stclouddiocese.org/worship/transfer.htmPlease Wait... | Cloudflare
http://www.collinsdictionary.com/dictionary/english/holy-thursdayAttention Required! | Cloudflare
http://www.churchofengland.org/media/877842/5-table-vigils-fasts.pdf
History
Louis Duchesne - Wikipedia
https://en.wikipedia.org/wiki/Louis_Duchesne