Good Riddles

Question: A mother has five daughters, January is the first daughter, February is the second daughter , March is the third daughter, April is the fourth daughter. What is the name of the fifth child

Question: There are 4 light bulbs in a room and 4 switches corresponding to these four light bulbs (in a random order). You cannot see the light bulbs from where the switches are.

If you can only visit the room with the light bulbs once, how can you figure out which switch belongs to which light bulb?

Question: Which thing that comes once in a year, twice in a week?

Question: Two people race for the title of leader. Bob won the race who is the new leader.

Question: Living I do not exist. Dead I am an inspiration. You always doubt me. But never reject me. I am what is given from old to young. Without me people would not learn mistakes. What am I?