Daily quest

Daily quests (popularly nicknamed dailies) are repeatable quests that can be acquired and completed once per day. These quests have significantly better rewards than other repeatable quests. Daily quests come in many different flavors, and many are for reputation, professions, seasonal events, and pet battles.

Daily quests are denoted by blue exclamation marks and question marks appearing over the quest giver's head, as compared to regular quests, which have yellow marks.

Reset times
The exact reset time for daily quests (that is, the time the next "day" begins) is the same across the region (North America, Europe, Oceanic, etc...), selected to be early in the morning local time. These times are fixed, although local times may increase or decrease by an hour at two points in the year due to changes. The reset times for each region are: Times are given in, since many different time zones may be playing in each region. This site displays the current UTC, along with the offset from the local time zone.
 * Europe (EU Region): 07:00:00 UTC
 * North America & Oceania (US Region) : 15:00:00 UTC
 * Asia: China, Korea & Taiwan (CN, KR & TW Regions): 23:00:00 UTC

History
Before the introduction of daily quests, the sole means of gaining high levels of standing with the various reputation factions was constantly grinding mobs, either for direct standing gains from kills, or from special items looted from mobs that could be turned in to a repeatable reputation quest giver. This was a long, slow, and arduous process, especially if players were trying to reach standing with any of the factions.

Daily quests were introduced during Burning Crusade in patch 2.1 for the Netherwing, Ogri'la, and Sha'tari Skyguard factions, with a system-enforced limit of 10 daily quests completed each day. The same few daily quests were available every day for the factions, and this quickly led to complaints about the repetitive, grindy nature.

In patch 2.3, Cooking daily quests were added and offered one quest from a pool of several in an attempt to ease the monotony. This concept was also used for the daily battleground, dungeon and Heroic dungeon quests added at the same time, and for future profession daily quests.

The daily limit was raised to 25 in patch 2.4, as the addition of the Shattered Sun Offensive series of daily quests alone provided up to 19 more quests to do each day. The Shattered Sun quests suffered from the same problem that the other faction daily quests did in that only the same 19 daily quests were available each and every day. The Argent Tournament, added during Wrath of the Lich King in patch 3.2, was after progressing far enough, the first daily quest hub to offer at least some variation from a couple of the quest givers.

Daily dungeon, Heroic dungeon, and battleground quests were all removed during patch 3.3, owing to the introduction of the Dungeon Finder tool and the Random Battleground system being implemented.

With the launch of Cataclysm in patch 4.0, Blizzard finally provided quest hubs on Tol Barad Peninsula that did not offer the same quests each and every day&mdash;the quest givers provided players six quests from a pool of 22. The same was true of the Firelands Invasion daily quest hubs added in patch 4.2, as players could complete up to 18 quests from a pool of 55 each day, with more quests available after gaining higher reputation standing.

The 25-daily limit was removed altogether in patch 5.0, as players complained about previous-expansion daily quests eating into the total. A vast amount of level-90 daily quests were added with the launch in Mists of Pandaria, providing players the opportunity to complete up to approximately 54 daily quests on Pandaria alone, after faction limitations had been satisfied, from a pool of roughly 278.

Legion introduced the World Quest system, which replaced daily quests on the expansion's new continent, the Broken Isles.