日期工具箱
日期差计算与日期加减（天/周/月/年）一站式工具箱
Free to useOpen and use right awayDate & Time
About this tool
Date Toolkit is a free online set of date calculators in one place: the exact days and working days between two dates, plus adding or subtracting days to project deadlines. It suits project schedules, contract terms and countdown planning, and every calculation runs locally in your browser.
Frequently asked questions
Can it count working days?
Yes, it counts working days separately from weekends between the two dates.
Can it add or subtract days from a date?
Yes, add or subtract any number of days from a starting date to back-calculate deadlines.
Is my data uploaded?
No. Date math is computed locally and nothing is uploaded.