How to count days from a date
To find the date a set number of days from a start date, you add those days to the start and roll the result through each month and year, accounting for how many days each month has and for leap years. Doing it by hand is error-prone once you cross a month boundary; this calculator does it exactly. Enter 90, leave the start date on today, and you get the precise date 90 days from now, along with the day of the week it falls on.
Why the weekday matters
Most people who count days forward care about the weekday at the end, not just the date — a deadline that lands on a Saturday is effectively the Friday before, and a delivery promised in 30 days that arrives on a Sunday is really the Monday after. The result here always shows the weekday so you can plan around it rather than being caught out.
Business days versus calendar days
Contracts, invoices and legal notices are often written in business days, meaning weekends do not count. Switch the count to "business days only" and the calculator skips every Saturday and Sunday, so "10 business days from today" lands two calendar weeks out rather than ten calendar days. Note that public holidays are not removed, because they differ by country and region — subtract any that apply to you.
Common uses
- Payment terms: 30, 60 or 90 days from an invoice date.
- Notice periods: count forward from the day you hand in notice.
- Deadlines and returns: a 14-day return window or a 90-day warranty from the purchase date.
- Countdowns: how many days until an event, using the "before" direction from the event date.
Counting backward
To work out when something must start so it finishes on a given date, switch the direction to "before" and enter the deadline as the start date. For example, 90 days before a launch tells you the latest date you can begin. If you need the raw number of days between two specific dates rather than counting a fixed number forward, the date calculator does that, and the age calculator handles exact ages from a date of birth.