Instantly discover which day of the week any date falls on with our precise astronomical-grade algorithm.
That date was a
Calculations automatically account for February 29th cycles.
Instant results as you type or change dropdown values.
Check birth dates, historical anniversaries, or future event scheduling. Supports dates across centuries with high precision.
This tool runs entirely in your browser. No data is stored or sent to any server. Your inputs remain 100% private.