Calculate difference between dates
Calculate the signed day difference between two calendar dates.
Input & settings
How to use this tool
Difference = end minus start. Same-day results are zero; an earlier end produces a negative difference.
Limits and behavior
Uses the Gregorian calendar for years 1900–2100. Dates must be exact YYYY-MM-DD values. Calendar days are counted at UTC midnight, independent of daylight saving. Hours/minutes/seconds are the equivalent multiples of uniform calendar days, not elapsed local-clock time across DST changes. Input is limited to 1 MB and output to 3 MB. No input content is saved by CraftAI.
Calculate the day difference between dates
Compare two calendar dates and obtain the number of days separating them, including whether the end is earlier.
Does the result depend on the hour or time zone?
This tool compares calendar dates, not exact timestamp instants. Use the duration calculator for precise times.
Related tools: calculate days until date · calculate time duration