Year

Year 2019 is 95.4% complete.
95.40975902393932%

Month

Month 2019-12 is 45.95% complete.
45.95359584930825%

Day

Day 2019-12-15 is 24.56% complete.
24.56122373165616%

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

For example