Days Until / Days Since Calculator
Count the exact number of days until any future event or days since any past date.
Days-until countdowns are among the most common date tool searches: how many days until Christmas, how many days until a vacation, how many days since a big event. Having it calculated precisely with weeks and months as well gives a clearer sense of scale — "47 days" lands differently when you know it is also 6.7 weeks or 1.5 months.
Quick reference: 30 days is about 4.3 weeks and about 1 month. 90 days is a quarter year. 180 days is half a year. 365 days is one year. 100 days from any date is about 3.3 months.
Common uses
Event planning: weddings, parties, graduations, birthdays. Legal and financial: contract deadlines, lease expirations, loan payoff dates. Personal milestones: sobriety anniversaries, fitness goals, streaks. Professional: project deadlines, product launches, review periods. The countdown itself creates useful psychological urgency or relief — knowing you have 74 days until a deadline is more actionable than knowing the deadline is "in about two and a half months."
Frequently asked questions
Does the calculator count today?
The count starts from today (day 0) to the target date. If today is the target date, the result is 0. Tomorrow is 1 day away. This is the standard "days until" counting convention.