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Calendar Date Incrementer

World's Simplest Time Tool

With this browser-based application, you can add a custom time interval to a calendar date. You can increment a date by any number of years, months, days, hours, minutes, and seconds. You can also customize the date output format to your needs or choose from over a dozen predefined date formats. Created by computer nerds from team Browserling.

See Examples
See Pricing and Plans

Calendar Date Incrementer

World's Simplest Time Tool

With this browser-based application, you can add a custom time interval to a calendar date. You can increment a date by any number of years, months, days, hours, minutes, and seconds. You can also customize the date output format to your needs or choose from over a dozen predefined date formats. Created by computer nerds from team Browserling.

Use This Tool
See Examples
See Pricing and Plans
Tool Options

Date Increment Interval

Enter a time interval by which to increase all input dates.
Date interval examples: • 2 years 4 months 15 days • 1y 6mo 3d 20h 45m 59s • 3 months 10 seconds • 300 days

Output Date Format

Select the output date format.
Create a custom date format. (Works if you select "custom" date format in the above list.)
• YYYY/YY – year, • MMMM/MMM/MM – month, • dddd/ddd – day of week, • DD – day, • hh – hour, • mm – minute, • ss – second.

Padding and Time Format

Use zero padding to display output dates in full format.
Convert all clock times to 12-hour format (am/pm).

What Is a Calendar Date Incrementer?

This is a quick online utility for incrementing one or more calendar dates by any time interval. For example, if you have created a detailed plan for a trip to New York and all of a sudden the trip has to be postponed for 7 days because of bad weather conditions, then the list of your plans (such as visiting attractions and museums) have to be moved forward by 7 days. With this program, you can instantly add these 7 days to each date in your list. Or, for example, if you have made a deposit and you know it will be returned after 6 months, then you can quickly calculate this future date. To add days, months, and years to any calendar date, all you need to do is enter the dates in the input text area and specify the increment interval in the options. The input dates must be entered one per line in the standard full format "YYYY-MM-DD" or "YYYY/MM/DD", or shortened form "YYYY-MM", "YYYY/MM", and "YYYY". Additionally, you can use the expanded format that includes a clock time, such as "YYYY-MM-DD hh:mm:ss" or "YYYY/MM/DD hh:mm:ss". The interval in the options can be specified using individual date/time components that include years, months, days, hours, minutes, or seconds. For example, the interval can be "2 years", "5 months 6 days 20 hours", and "1y 2mo 10d 12h 30min 1sec". Once the program adds the interval to all current dates, it will output the new dates in the output text area. You can switch between multiple output date formats in the options or create a custom format using abbreviations to specify time/date components (see the components notation in the options). In addition to choosing a format, you can enable date padding (so that a month such as "2" is printed as "02") and change the time to a 12-hour clock format. If you are interested in date decrement, use the date decrement) tool. Timeabulous!

What Is a Calendar Date Incrementer?

This is a quick online utility for incrementing one or more calendar dates by any time interval. For example, if you have created a detailed plan for a trip to New York and all of a sudden the trip has to be postponed for 7 days because of bad weather conditions, then the list of your plans (such as visiting attractions and museums) have to be moved forward by 7 days. With this program, you can instantly add these 7 days to each date in your list. Or, for example, if you have made a deposit and you know it will be returned after 6 months, then you can quickly calculate this future date. To add days, months, and years to any calendar date, all you need to do is enter the dates in the input text area and specify the increment interval in the options. The input dates must be entered one per line in the standard full format "YYYY-MM-DD" or "YYYY/MM/DD", or shortened form "YYYY-MM", "YYYY/MM", and "YYYY". Additionally, you can use the expanded format that includes a clock time, such as "YYYY-MM-DD hh:mm:ss" or "YYYY/MM/DD hh:mm:ss". The interval in the options can be specified using individual date/time components that include years, months, days, hours, minutes, or seconds. For example, the interval can be "2 years", "5 months 6 days 20 hours", and "1y 2mo 10d 12h 30min 1sec". Once the program adds the interval to all current dates, it will output the new dates in the output text area. You can switch between multiple output date formats in the options or create a custom format using abbreviations to specify time/date components (see the components notation in the options). In addition to choosing a format, you can enable date padding (so that a month such as "2" is printed as "02") and change the time to a 12-hour clock format. If you are interested in date decrement, use the date decrement) tool. Timeabulous!

Calendar Date Incrementer Examples

Click to try!
click me

Increment a Date by 50 Days and 6 Hours

This example adds 50 days and 6 hours to the given calendar date. It calculates the new date and outputs it in the same format as the input date.

2022-01-30 10:00:00
2022-03-21 16:00:00
Required options
These options will be used automatically if you select this example.
Enter a time interval by which to increase all input dates.
Select the output date format.
Create a custom date format. (Works if you select "custom" date format in the above list.)
Use zero padding to display output dates in full format.
Convert all clock times to 12-hour format (am/pm).
click me

Find the 90th Day of Every Year

In this example, we find which day of the week and month happens to be on the 90th day from the beginning of a year. We calculate these dates for the years 2023 to 2030 and output the results in an unpadded format including the day of the week.

2023/01/01 2024/01/01 2025/01/01 2026/01/01 2027/01/01 2028/01/01 2029/01/01 2030/01/01
Saturday, April 1, 2023 0:0:0 Sunday, March 31, 2024 0:0:0 Tuesday, April 1, 2025 0:0:0 Wednesday, April 1, 2026 0:0:0 Thursday, April 1, 2027 0:0:0 Friday, March 31, 2028 0:0:0 Sunday, April 1, 2029 0:0:0 Monday, April 1, 2030 0:0:0
Required options
These options will be used automatically if you select this example.
Enter a time interval by which to increase all input dates.
Select the output date format.
Create a custom date format. (Works if you select "custom" date format in the above list.)
Use zero padding to display output dates in full format.
Convert all clock times to 12-hour format (am/pm).
click me

Increase all Date Parts

In this example, we increment all parts of three calendar dates at once. We add 1 year, 2 months, 3 days, 4 hours, 5 minutes, and 6 seconds to the dates, re-format the dates to a new format "YYYY, DD MMM hh:mm:ss", and use a 12-hour clock time for the clock time part.

1000-01-01 10:00:01 2000-02-02 02:02:02 3000-03-30 03:30:30
1001, 04 Mar 02:05:07 pm 2001, 05 Apr 06:07:08 am 3001, 02 Jun 07:35:36 am
Required options
These options will be used automatically if you select this example.
Enter a time interval by which to increase all input dates.
Select the output date format.
Create a custom date format. (Works if you select "custom" date format in the above list.)
Use zero padding to display output dates in full format.
Convert all clock times to 12-hour format (am/pm).
click me

Add One Million Days to a Date

In this example, we paste a single date "2025-05-25" in the input and shift it by one million days in the future. It turns out that in a million days it will be April 22, 4763. We switch to the custom date format mode and print the date in format 4763_04_22 (Monday).

2025-05-25
4763_04_22 (Monday)
Required options
These options will be used automatically if you select this example.
Enter a time interval by which to increase all input dates.
Select the output date format.
Create a custom date format. (Works if you select "custom" date format in the above list.)
Use zero padding to display output dates in full format.
Convert all clock times to 12-hour format (am/pm).
click me

Day of the Week on Birthday

In this example, we increment the birthday date from 2022 by 5 years to find out what day of the week the birthday will fall on in 2027. To get only the day of the week in the output, we turn on the custom date format mode and use the format "dddd" which prints the full name of the weekday.

2022-06-17
Thursday
Required options
These options will be used automatically if you select this example.
Enter a time interval by which to increase all input dates.
Select the output date format.
Create a custom date format. (Works if you select "custom" date format in the above list.)
Use zero padding to display output dates in full format.
Convert all clock times to 12-hour format (am/pm).
click me

Celebrating a Centenary

In this example, we programmatically calculate when Facebook will have its 100th anniversary. We enter Facebook's founding date equal to "2004-02-04 00:00:00" into the input and add 100 years to it. We specify the time interval in the ISO 8601 format "0100-00-00 00:00:00" and find the result in the output equal to "4 February 2104 0:0:0".

2004-02-04 00:00:00
4 February 2104 0:0:0
Required options
These options will be used automatically if you select this example.
Enter a time interval by which to increase all input dates.
Select the output date format.
Create a custom date format. (Works if you select "custom" date format in the above list.)
Use zero padding to display output dates in full format.
Convert all clock times to 12-hour format (am/pm).

Pro tips Master online time tools

You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!

https://onlinetools.com/time/increment-calendar-date?input=2022-01-30%2010%3A00%3A00&interval=50%20days%206%20hours&format=YYYY-MM-DD%20hh%253Amm%253Ass&custom-format=YYYY-MM-DD%20hh%253Amm%253Ass%20%2528dddd%2529&padding=true&use-12-hour-clock=false

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Generate Overlapping Dates

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Generate Non-overlapping Dates

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Generate Random Date Intervals

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Generate Invalid Calendar Dates

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Convert Seconds To Hours

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Convert Seconds to Days

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Convert Seconds to Months

Find how many months are in the given seconds.

Convert Seconds to Years

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Convert Minutes to Seconds

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Convert Minutes To Hours

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Convert Minutes to Days

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Convert Minutes to Weeks

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Convert Minutes to Months

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Convert Minutes to Years

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Convert Hours To Seconds

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Convert Hours to Minutes

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Convert Hours to Weeks

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Convert Hours to Months

Find how many months are in the given hours.

Convert Hours to Years

Find how many years are in the given hours.

Convert Days to Seconds

Find how many seconds are in the given days.

Convert Days to Minutes

Find how many minutes are in the given days.

Convert Days to Weeks

Find how many weeks are in the given days.

Convert Days to Months

Find how many months are in the given days.

Convert Days to Years

Find how many years are in the given days.

Convert Weeks to Seconds

Find how many seconds are in the given weeks.

Convert Weeks To Minutes

Find how many minutes are in the given weeks.

Convert Weeks To Hours

Find how many hours are in the given weeks.

Convert Weeks to Days

Find how many days are in the given weeks.

Convert Weeks to Months

Find how many months are in the given weeks.

Convert Weeks to Years

Find how many years are in the given weeks.

Convert Months to Seconds

Find how many seconds are in the given months.

Convert Months To Minutes

Find how many minutes are in the given months.

Convert Months To Hours

Find how many hours are in the given months.

Convert Months to Days

Find how many days are in the given months.

Convert Months to Weeks

Find how many weeks are in the given months.

Convert Months to Years

Find how many years are in the given months.

Convert Years to Seconds

Find how many seconds are in the given years.

Convert Years To Minutes

Find how many minutes are in the given years.

Convert Years To Hours

Find how many hours are in the given years.

Convert Years to Days

Find how many days are in the given years.

Convert Years to Weeks

Find how many weeks are in the given years.

Convert Years to Months

Find how many months are in the given years.

Convert a Bird's Age to Human Years

Find how old a human would be if he/she was a bird.

Convert a Human's Age to Bird Years

Find how old a bird would be if it was a human.

Convert Earth Time to Mars Time

Convert clock time on Earth to clock time on Mars.

Convert Mars Time to Earth Time

Convert clock time on Mars to clock time on Earth.

Convert Earth Date/Time to Stardate

Convert Earth time to Star Trek's stardate.

Convert Stardate to Earth Date/Time

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Print a list of clock times with hours equal mins equal secs.

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Set Straight Clock Hands

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Normalize Calendar Dates

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Rotate Calendar Dates

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Freeform Time Calculator

Perform freeform clock time arithmetics.

Freeform Date Calculator

Perform freeform calendar date arithmetics.

Calculate Clock Sum

Find the sum of hours plus minutes plus seconds.

Calculate Calendar Sum

Find the sum of years plus months plus days.

Find Clock Sum

Find clock hand position so that hr + min + sec equals your value.

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Find calendar date so that year + months + day equals your value.

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We're Browserling — a friendly and fun cross-browser testing company powered by alien technology. At Browserling our mission is to make people's lives easier, so we created this collection of time and date tools. All our tools share the same user interface, so as soon as you learn how to use one of the tools, you'll be a master of all tools. Behind the scenes, our time and date tools are actually powered by our web developer tools that we created over the last couple of years. Check them out!

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Privacy Policy
We don't log data
All conversions and calculations are done in your browser using JavaScript. We don't send a single bit about your input data to our servers. There is no server-side processing at all. We use Google Analytics and StatCounter for site usage analytics. Your IP address is saved on our web server for additional analytics. The free plan doesn't use cookies and don't store session information in cookies. The premium and team plans use cookies to store session information so that you are always logged in. We use your browser's local storage to save tools' input. It stays on your computer.
Terms of Service
The legal stuff
By using Online Tools you agree to our Terms of Service. All tools are free for personal use but to use them for commercial purposes, you need to get a premium plan. You can't do illegal or shady things with our tools. We may block your access to tools, if we find out you're doing something bad. We're not liable for your actions and we offer no warranty. We may revise our terms at any time.
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If you love our tools, then we love you, too! Use coupon code TIMELING to get a discount for our premium plans.
Didn't find the tool you were looking for? Let us know what tool we are missing and we'll build it!