Convert any day number of the year (1-366) into a standard calendar date. Supports leap years and provides instant results for any given year.
Reverse Ordinal Date Lookup
While most people know the date, many industrial and technical sectors operate purely on day numbers. Our tool allows you to translate those numbers back into human-readable calendar dates.
Manufacturing & Batch Codes
Food and pharmaceutical packaging often uses the “Julian” or ordinal day for expiry and batch tracking. Quickly decode Day 145 or Day 300 to see the real date.
Leap Year Intelligence
Our algorithm detects leap years automatically. It knows that in 2024 (a leap year), Day 60 is February 29th, whereas in 2025, Day 60 is March 1st.
Project Scheduling
Engineers and data scientists frequently use 365-day counts for timeline calculations. Use this tool to verify milestones on a standard calendar.