Days 2 to 6 - Waxing crescent - Increasing in size, the moon appears as a crescent.
Day 7 - First quarter - Half of the moon is lit.
Days 8 to 13 - Waxing gibbous - Larger than a semicircle, smaller than a full circle.
Day 14 - Full moon - We see all of the moon.
Days 15 to 20 - Waning gibbous - Decreasing in size.
Day 21 - Third quarter - Half of the moon is lit.
Days 22 to 26 - Waning crescent - Decreasing in size.
Day 28 - New moon. Cycle repeats on Day 1.