| || |
1 The concept of a month comes he moon's lunar month which is when it goes through all of it's phases. Also the word month comes from the same Latin prefix as moon mo-.
2 Yes, you can see the moon during the day. You can see the moon during the day because in the morning the moon might setting from the night time sky. Also the moon follows a close path of the sun, and it might not appear too but i rises and setts too.
3 New moon, you can only see the New Moon at night because the light of the earth is reflecting on the moon's surface, and is very dim. You can not se it during the day because the sun outshines it