A lunar calendar is a way to keep track of time based on the moon's cycles. Instead of following the sun like our regular calendar, it follows the phases of the moon. Full definition
Pregnancy Calendar is an advanced yet simple tool based on the principles of Chinese lunar calendar. (doctor-info.website)
With older students, you might begin by using a lesson plan on the Chinese lunar calendar. (educationworld.com)
Unfortunately, it's a tad late for Muslims to work out a week / two - week holiday to cover both holidays because 1) Muslim holidays are based on lunar calendars, and 2) these two holidays in particular are almost 3 months apart. (religion.blogs.cnn.com)