Year

Year 2019 is 64.3% complete.
64.30930140578039%

Month

Month 2019-8 is 73.31% complete.
73.31919733519504%

Day

Day 2019-8-23 is 72.89% complete.
72.89511248265667%

This site Dividing the year, month, day into 100 pieces and show the progress bar for you.

For example