Date Planning Tools
Due dates, project timelines, retirement, renewals, invoices.
Date planning helpers for individuals and businesses — generic due date, pregnancy (Naegele) due date, anniversary, retirement date, project timeline, subscription renewal, payment due, and invoice due dates with configurable weekends and holidays.
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Most used in Date Planning.
Due Date Calculator
Add N days to a start date for a generic due date.
Pregnancy Due Date Calculator
Naegele-rule estimated due date from LMP.
Anniversary Calculator
Upcoming anniversaries and their weekdays.
Retirement Date Calculator
Date you reach a target retirement age.
Subscription Renewal Calculator
Upcoming renewal dates for any cycle.
Payment Due Date Calculator
Due date + overdue tracking from issue + net terms.
Invoice Due Date Calculator
Business-day invoice due date + early-pay discount deadline.
New
Recently added.
Invoice Due Date Calculator
Business-day invoice due date + early-pay discount deadline.
Payment Due Date Calculator
Due date + overdue tracking from issue + net terms.
Subscription Renewal Calculator
Upcoming renewal dates for any cycle.
Project Timeline Calculator
End date from start + business-day duration.
Retirement Date Calculator
Date you reach a target retirement age.
Anniversary Calculator
Upcoming anniversaries and their weekdays.
Pregnancy Due Date Calculator
Naegele-rule estimated due date from LMP.
Due Date Calculator
Add N days to a start date for a generic due date.
All Date Planning Tools
8 tools available.
Due Date Calculator
Add N days to a start date for a generic due date.
Invoice Due Date Calculator
Business-day invoice due date + early-pay discount deadline.
Pregnancy Due Date Calculator
Naegele-rule estimated due date from LMP.
Anniversary Calculator
Upcoming anniversaries and their weekdays.
Payment Due Date Calculator
Due date + overdue tracking from issue + net terms.
Retirement Date Calculator
Date you reach a target retirement age.
Subscription Renewal Calculator
Upcoming renewal dates for any cycle.
Project Timeline Calculator
End date from start + business-day duration.
FAQ
About Date Planning Tools.
Is the Pregnancy Due Date a medical tool?
No — it's an educational estimator using Naegele's rule (LMP + 280 days, adjusted for cycle length). Always confirm gestational age with a qualified clinician.
How do project timelines handle weekends?
The Project Timeline and Working Days calculators step forward one business day at a time, skipping the configured weekend and any holidays you provide, so an N-business-day project actually finishes on a working day.
What terms do the invoice calculators support?
Any Net-N terms in either calendar days (Payment Due) or business days (Invoice Due), plus an optional early-pay discount window (e.g. 2/10 Net 30).
Are subscription renewals accurate across month boundaries?
Yes — we clamp the day to the last valid day of the target month, so a Jan 31 subscription renews on Feb 28/29 correctly instead of overflowing into March.
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