October 4, 2021
The moon takes 29.5 days to complete its cycle of phases. This is called a synodic month of which there are 12.4 of each year. The synodic month that starts in October 2021, is lunation 1222.
A waning crescent moon rose on October 4, 2021, at 5 am. The next new moon occurs on October 6, 2021. Image credit: NASA, SVS, Ernie Wright.