CalculatorSpan Date & Time Tools

Add or subtract days, count days between two dates, count working days, and find the time hours from now. Works offline.

Four date and time calculators in one popup. No sign-up, no tracking, and it works offline. WHAT YOU CAN DO Add or subtract from a date Pick a date, choose days, weeks, months or years, and get the exact result. Month ends are handled properly: add one month to January 31 and you get February 28, or February 29 in a leap year, and the extension tells you why. Count days between two dates Get the gap in years, months and days, plus total days, weeks, months and hours. Tick one box to include the end date. Count working days Business days between two dates, Monday to Friday by default. Change which days count as the weekend for a six or seven day week, and paste in your own holiday dates to exclude them. Hours from now, or hours ago Enter any number of hours and minutes and see the exact clock time and date it lands on, with the weekday and whether it crosses midnight. DETAILS Every result shows the weekday, day of the year and ISO week number where relevant. One click copies the result to your clipboard. Leap years and different month lengths are handled automatically. The extension asks for no permissions at all. It cannot read your browsing history,