How to Keep Track of Birthdays and Anniversaries
A birthday remembered at breakfast gives you time to call.
Special dates, made simple
Practical Guides
Step-by-step guides to birthdays, date calculations, celebrations, calendars, and backups.
Special Date Tracker
How to Build a Family Birthday Calendar
A family birthday calendar has two jobs.
How to Remember Work Anniversaries
A work anniversary can prompt a simple note of appreciation or a chance to look back at the projects someone helped deliver.
Birthday Countdown
How Leap Years Affect February 29 Birthdays
A February 29 birthday has an exact date in leap years.
Why a Birthday Countdown Can Change When You Travel
A birthday countdown uses the date where your browser is running.
What You Can Calculate Without a Birth Year
Knowing a friend's birthday does not require knowing their age.
Age Calculator
How to Calculate Your Exact Age
If someone asks how old you are, the usual answer is completed years.
Calculating Age on the Date of an Old Photograph
A photo caption needs the person's age when the picture was taken.
Why Calendar Age and Days Lived Give Different Answers
Calendar age and total days describe the same interval using different units.
Anniversary Calculator
How to Calculate Wedding Anniversaries
Planning an anniversary often means juggling the wedding date and the date that guests can attend.
Choosing an Anniversary Date After Two Ceremonies
A civil ceremony and a later wedding celebration can create two meaningful dates.
Planning Around a February 29 Anniversary
A leap-day wedding or work start needs an observance rule before you can plan its next annual celebration.
Days Together Calculator
How to Calculate Days Together
The phrase “100 days together” can refer to two dates one day apart.
Checking Whether Today Is Already a Relationship Milestone
An upcoming milestone result can show today.
Counting Days Together When a Leap Day Falls Between You
A leap day changes a duration without moving a calendar anniversary.
Milestone Date Calculator
How to Calculate 100-Day and 1000-Day Milestones
Milestones measured in days are handy when an ordinary anniversary is too far away or when the number itself is part of the celebration.
Working Backward From a Celebration Deadline
A preparation deadline is often easier to calculate from the celebration date backward.
Large Day Milestones Without Approximate Years
A 10,000-day celebration needs a day calculation because an approximate conversion to years can shift the result.
Celebration Planner
How to Plan Birthday Celebrations on a Budget
A useful birthday budget starts with what you can comfortably spend and the kind of time you want to share.
Comparing Celebration Options in One Currency
Two possible celebrations are easier to compare when each has a complete cost list.
What a Celebration Checklist Percentage Can Tell You
A checklist percentage measures the share of listed tasks checked.
Calendar & Exporter
How to Build a Special Date Calendar
A special date calendar is easiest to maintain when it answers a short question: what is coming up that I care about?
How to Export Important Dates to Your Calendar
Exporting is useful when you want to see special dates alongside appointments or move a private collection to a new browser.
How to Organize and Protect Your Personal Date Records
A date list can contain more personal information than it first appears.