[Forum Event] Solve A Puzzle About Time!

COTK-Chen

Your Majesty, a new round of Forum Event is coming.
Spring is coming nearer to us. Days become longer and nights become shorter. Let's solve a puzzle related to Time!

Question: What occurs twice in a lifetime, but once in every year. Twice in a week but never in a day?
Duration: Ends on Mar.18th
Servers: All Servers
Requirements:
1. Please write down your answerand a simple explanation;
2. Your IGN and Server.
What's your prize:
Players with all the correct explanation and answer will be rewarded with 80 gold.
Note:
1. The rewards will be released on Mar.18th;
2. Remember to leave your answer together with your information under Forum or FB event page. It’s a pity only to find there’s no IGN and Server No. when we want to send rewards to you;
3.Please read the requirements carefully or else you may miss the chance to be rewarded;
4. No abusive or rude remarks allowed in this event;
5. The final explanation is reserved by COTK.