Woohoo Monster Hunter World Events!
List of Monster Hunter World Events and Rewards for each. Console and PC included below. Keep in mind Capcom does give a warning that “All quests are subject to change and/or cancellation without prior notice” per their website.
Official Capcom Event Schedule:
http://game.capcom.com/world/steam/us/schedule.html?utc=-7
Reddit List of Rewards:
https://www.reddit.com/r/MonsterHunterWorld/comments/8a9git/summary_of_special_rewards_from_event_quests/
MHW Wiki Event Quests:
https://monsterhunterworld.wiki.fextralife.com/Event+Quests
MHW Wiki Event Rewards:
https://monsterhunterworld.wiki.fextralife.com/Event+Quests+List