Date & time tools

Age and interval calculations with correct handling of leap years and time zones.

• Age & Date Difference CalculatorCalculate exact age in years, months and days, or the interval between any two dates.
• Business Days CalculatorCount working days between two dates, add business days, or total a month. Your weekend pattern, your holidays, and the Excel NETWORKDAYS convention.
• Time Zone Meeting OverlapFind the hours two cities actually share in a working day, at the date you choose. Real DST offsets, honest no-overlap answers, and a rotation when thin.
• Order Cut-Off Date CalculatorWork backwards from the date a parcel must arrive to the last day you can order it, through transit, handling days, courier closed days and holidays.
• Payment Terms CalculatorTurn net 30, EOM and 2/10 net 30 into the date a term actually produces, naming the trigger and showing the 30-day spread one ambiguous clause can hide.
• Overtime Calculator — India Labour CodesOvertime under the India Labour Codes, with the daily and weekly routes both shown and the more favourable to the worker applied, as s.27 requires.
• ISO Week Number CalculatorISO 8601 week numbers, with the two rival conventions side by side. 2026 has 53 ISO weeks, not 52, so check your 52-week assumption.
• Payroll Cut-Off Date BuilderBuild your payroll month: attendance cut-off, run date, salary credit, TDS by the 7th, EPF and ESI by the 15th, and the LOP divisor.

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