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Accurately calculate the number of business days by automatically excluding weekends and custom holidays.
Still counting working days manually? This tool automatically calculates the number of business days between two dates, accurately excluding weekends and custom holidays to output an exact working day count. It is ideal for project scheduling, payroll tracking, and attendance management.
Date inputs must follow the YYYY-MM-DD format. A maximum of 30 custom holiday dates is supported. Results are for reference only and are not legally or contractually binding. All calculations are performed locally in your browser, ensuring no data upload risks.
For cross-timezone projects, we recommend using UTC dates to avoid time difference errors. Common use cases include calculating project durations (e.g., 2023-09-01 to 2023-09-30, excluding the Mid-Autumn Festival, results in 21 business days) and tracking monthly attendance. Holiday data should be updated regularly to ensure accuracy.
Expiration Date Calculator
Calculate the expiration date based on the production date and shelf life, or check the near-expiry and expired status based on the expiration date.
100 Day Calculator (Baby's Hundred Days)
Enter your baby's birth date to instantly view the Gregorian and Lunar dates, as well as the day of the week, for their one-month, 100-day, and first birthday milestones. Perfect for planning your celebrations.
Bazi to Gregorian Calendar Converter
Free online two-way converter for Gregorian dates and Bazi (Four Pillars of Destiny). Supports Ziwei and Ziping school Rat hour (Zi hour) rules for accurate Chinese astrology calculations and calendar conversions.
Lunar and Solar Calendar Converter
A tool for converting dates between the lunar and solar calendars. It supports lunar leap months and is ideal for looking up holidays, birthdays, or historical dates.
Expiration Date Calculator
Calculate the expiration date based on the production date and shelf life, or check the near-expiry and expired status based on the expiration date.
100 Day Calculator (Baby's Hundred Days)
Enter your baby's birth date to instantly view the Gregorian and Lunar dates, as well as the day of the week, for their one-month, 100-day, and first birthday milestones. Perfect for planning your celebrations.
Bazi to Gregorian Calendar Converter
Free online two-way converter for Gregorian dates and Bazi (Four Pillars of Destiny). Supports Ziwei and Ziping school Rat hour (Zi hour) rules for accurate Chinese astrology calculations and calendar conversions.
Lunar and Solar Calendar Converter
A tool for converting dates between the lunar and solar calendars. It supports lunar leap months and is ideal for looking up holidays, birthdays, or historical dates.
Age Calculator (Western, Chinese & Lunar)
Enter your birth date to instantly calculate your exact age, traditional Chinese age, and total days alive, plus find your Chinese zodiac, horoscope, and lunar birthday.