Countdown Timer
Calculator Use
Use this online countdown timer clock to count down from today to the date and time of any event. Count down days to a birthday, holiday, vacation or special event.
The countdown timer takes your date and event time and creates a live-action timer. The timer clock shows how many days, hours, minutes and seconds until your event. It even shows years if your event is more than 365 days from today.
How Does the Countdown Timer Work?
The countdown timer uses a coding function to calculate the difference in between the current date and time and your event date and time. It then refreshes the timer once per second to count-down days or count-up days from your event date.
Doing math with dates is challenging because not all months have the same number of days. Also, if you are going to do subtraction with hours, minutes and seconds you have to borrow based on units of 60 for seconds or minutes and not the standard 10 that you would use in regular number subtraction.
Leap years also complicate doing math with dates since they include an extra day compared to regular 365-day years.
The CalculatorSoup® Countdown Timer gives you way to automatically create a countdown clock for any date in the future. It also happens to count UP from a date in the past if you want to know how long it's been since something happened.
You can try it out. Do you know what time you were born? Input your birthday and time of birth and the countdown timer will count up, showing you how many years, hours, minutes and seconds since your moment of birth.
How to Use the Countdown Timer
Input the date and time of any event, future or past. You can calculate time until:
- Your next birthday
- The start of your vacation
- Your anniversary
- Any due date or expiration date
- When the school year begins or ends
CalculatorSoup® Time and Date Calculators
CalculatorSoup offers several other time and date calculators that you may find useful for your time calculations.
- The Time & Date Difference Calculator lets you calculate the length of time between any two dates and times
- The Date +- Days or Business Days Calculator lets you input a date and add or subtract any number of days
- The Date +- Calendar Units Calculator takes a date and lets you add or subtract a number of days, weeks, months, quarters or years