I built a free, no login tool that calculates and shows the current year as a progress bar with continuously updating percentage, and 3 other visualization models.

It has a customization feature where you can track any time period up to 100 years as a progress bar, and a lifespan feature where you input your birthday and sex.

It handles leap years, time zones, and runs automated weekly snapshots via GitHub Actions + Puppeteer and posts on X.

Would love feedback on the model or edge cases I might have missed.