阴历 (yīn lì): lunar calendar

My grandmother only remembers her lunar calendar birthday, so every year we have to check the calendar to celebrate it for her.

Spring Festival is on the first day of the first lunar month, but its date on the solar calendar changes every year.

According to the lunar calendar, the Mid-Autumn Festival is on the 15th day of the eighth month, and the moon is fullest that night.

Many traditional festivals are determined by the lunar calendar, such as the Dragon Boat Festival and the Double Ninth Festival.

I'm used to showing both the solar and lunar calendars on my phone calendar, so I won't miss important lunar dates.