The player, each day, can confirm to obtain a daily reward. These include gold, tournament tickets, seals etc.
In Duel of Champions, if the player skips a day of obtaining the reward, they can still obtain it the next day. In Heroes Online, the player's daily reward is set back to day 1.
In Heroes Online, the player, after skipping a day, their day is reset to 1. However, upon reaching day 5, the reward does not reset to day 1; the player will continue to obtain the rewards at day 5.