Work Anniversary Calculator
Calculate years of service, total weeks employed, and the next work anniversary from a start date.
Continue with another calculation
Core Week Calculator
Convert dates to ISO weeks, turn week numbers into date ranges, calculate weeks between dates, add/subtract weeks and count from today.
Open →Date & Work Calculators
Use separate pages for days between dates, business days, working days and week numbers.
Open →Week Calendar
Browse ISO weeks by year with Monday-to-Sunday ranges and highlighted current week.
Open →When to use this tool
Useful for HR reminders, employee recognition, benefits milestones, and service awards.
Practical uses
Calculate years of service, total weeks employed, and the next work anniversary from a start date.
These planning tools are designed for quick answers, but they also work well as part of a bigger workflow. You can pair them with the year calendar, current week page and week guides to plan projects, delivery windows, payroll cycles, reporting periods and deadlines.
FAQ
Can I use this for contract anniversaries too?
Yes. The same logic works for any recurring annual milestone date.
Does it show the next anniversary?
Yes. The result includes the next annual milestone date.