Gold Mine refreshes 3 times a day - at 6:00, 12:00 and 18:00 UTC.

Gem Mine refreshes every day at 18:00 UTC.

The Pit starts every other Monday at 10:00 UTC and lasts 7 days.

2 new Bosses are unlocked every 24 hours.

1 Power Sigil is restored every 12 hours (but you always can buy extra for 40 gems).

Dark Tower starts every other Monday at 10:00 UTC and lasts 7 days.

1 Attempt is restored every 12 hours if you were defeated and lost it.

Divine Arena is reset and changed every 2 days at 18:00 UTC.

Events (Global and Chosen Hero) start on Fridays at 10:00 UTC.

Chosen Hero lasts 3 days, which is followed by a 1 day cooldown.

Global Events last 6 days and are also followed by a 1 day cooldown.

Event Bosses are refreshed every day during the Event at 18:00 UTC.

Shop in Event Center (and Amber Clovers) is reset every Friday at 10:00 UTC.

Mini Events (such as Unity of Factions, Gold Vein, Accession of Legends, etc.) are reset on Mondays and Fridays at 10:00 UTC.

Sapphire's Missive starts every week on Thursdays at 10:00 UTC and lasts 23 hours.

Lucky Hand starts every week on Mondays at 10:00 UTC and lasts 48 hours.

Wish Shop starts on Wednesdays at 10:00 UTC and lasts 2 days.

Turf War consists of 18 clashes over the course of 6 days.

Turf Wars start on Mondays at 19:00 UTC.

The 1st clash lasts from 19:00 to 01:00 UTC, the 2nd - from 01:00 to 13:00 UTC, the 3rd - from 13:00 to 19:00 UTC. Then it cycles until the Turf War ends on Sunday at 19:00 UTC, which is followed by a 1 day cooldown.

Daily Quests reset each day at 18:00 UTC.

Weekly Quests reset each Sunday at 18:00 UTC.

The Hunt can be started pretty much any time you want.

Hunts for Legendary Pets last 24 hours.
Hunts for Epic Pets last 12 hours.
Hunts for Rare Pets last 6 hours.

Playtime Rewards are refreshed every day at 18:00 UTC.