Following First quarter, the amount of light an observer sees gradually increases from evening to evening for about a week until Full Moon. We call these phases, waxing phases.

Waxing gibbous phase

Explanation:

When a moon during direct sunlight appears only one half, it is called a waxing gibbous moon. When the moon starts to appear more and more until it is fully seen as a whole, this process is called waxing gibbous phase, because the moon is "waxing" away.