DateKit
Date Tools That Stay Out Of Your Way
Calculate date differences, shift dates by days, and convert Unix timestamps without switching tabs.
Add / Subtract Days
Unix Timestamp Converter
Common Questions
Can I calculate timezone differences?
DateKit calculates based on your browser locale and displays UTC output for Unix conversions. For timezone-to-timezone scheduling, convert each time to Unix first.
Does DateKit support negative date offsets?
Yes. Use a negative number in Add / Subtract Days to move backwards from the base date.
What Unix formats are accepted?
You can input Unix seconds (10 digits) or milliseconds (13 digits). DateKit auto-detects the unit and returns local, UTC, and ISO values.
Is DateKit free to use?
Yes. DateKit runs fully in your browser and is free to use.