About DayFig
Last Updated: 2026
DayFig is a free, no-registration suite of US-focused date and time calculator tools. We built it to solve a problem that every American professional, student, and small business owner runs into: counting days accurately in a calendar shaped by 11 federal holidays, weekend observance shifts, state-level variations, and the quirks of US payroll, tax, and academic schedules.
Who Runs DayFig
DayFig is an independent editorial research project run by The DayFig Editorial Team. We are not affiliated with, endorsed by, or sponsored by GSA, OPM, the IRS, the Federal Reserve, or any government agency or school — and we do not issue government rates or legal rulings. The team is responsible for every page, figure and tool on this site.
What We Do
DayFig currently offers 22 independent calculator tools across date difference, date arithmetic, calendar reference, payroll, and personal time categories. Every tool runs entirely in your browser — no accounts, no sign-ups, no data uploads. You enter your dates and get an instant, accurate result.
Our tools are built specifically for US scenarios. We automatically exclude all 11 federal holidays with proper weekend observance shifts, support American vertical contexts like HR payroll cycles, project deadlines, PTO accounting, and school assignment planning, and align to US standards rather than generic global conventions.
Our Approach to Accuracy
Date math in the US is deceptively hard. A “15 business day” deadline can shift based on which holidays fall in the window, whether a holiday lands on a weekend, and whether your contract counts the start date as day zero or day one. DayFig handles all of this automatically, and every tool documents its algorithm in an expandable detail panel so you can verify the logic yourself.
We maintain a single US Federal Holidays reference page as the authoritative source for every business-day calculation on the site, including NYSE/Nasdaq closure rules and IRS tax-deadline connections. This reference is reviewed annually against the official OPM federal holiday schedule.
Who DayFig Is For
- HR and payroll teams counting payable workdays, PTO accruals, and probation periods.
- Project managers calculating delivery dates, reverse deadlines, and shutdown-aware schedules.
- Small business owners tracking contract terms, invoice windows, and compliance deadlines.
- Students and parents planning assignment timelines and semester durations.
- Taxpayers and accountants verifying IRS filing windows and extension deadlines.
Long-Term Iteration
DayFig is not a static tool dump. We continuously update our calculators, refresh the federal holiday reference each year, and publish original US-focused guides on our blog that explain the rules behind every calculation. Each page carries a “Last Updated” tag so you can see the site is actively maintained — a signal we take seriously in an era of stale, AI-generated tool sites.
Part of the FIG Tool Cluster
DayFig is part of a broader family of focused, no-registration utility sites including UnitFig, VivMetric, MoodFig, and BodyStd. Each site is built around the same principle: do one thing exceptionally well, keep it free, and respect the user’s time and privacy.
What we are not
We are not the GSA, OPM, the IRS, a payroll provider, a law firm, or an accounting firm. Where official sources or professional services help, we point you to them, but we hold no special endorsement and our recommendations are never paid for. Federal holidays, per diem rates, and tax deadlines change — always confirm the current official schedule with the issuing agency before acting.
Contact and Feedback
DayFig is a free tool site with no accounts and no registration. If you spot an error in a calculation or have a tool suggestion, use our contact form or email [email protected] — we respond to every legitimate inquiry. Please also review our Privacy Policy and Terms of Service.