# Day Counter

> Quickly calculate the exact number of days between two specific dates.

Page: https://askcalculators.com/calculator/day-counter/
Definition: https://askcalculators.com/calculator/day-counter/definition.json
JSON Schema: https://askcalculators.com/calculator/day-counter/schema.json
Version: 7.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/day-counter/

## Inputs
- startDate: Start Date; type=date; optional
- endDate: End Date; type=date; optional

## Outputs
- result: Result; format=text; primary

## Formula
Calendar-day difference is the UTC date difference; inclusive mode adds one day.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.