Blog
Insights, updates, and articles about holiday and vacation data, API development, and public holidays from HolidayDB.
Holiday API Comparison 2026: 5 Best Public Holiday APIs for Developers
Compare the best holiday APIs in 2026: HolidayDB, Calendarific, Abstract, Nager.Date, and HolidayAPI. Feature matrix, code examples, and free-tier limits.
SLA Deadline Calculator - Count Business Days for Support & Compliance
Need to calculate an SLA deadline in business days? Free calculator skips weekends and holidays automatically by country. Accurate support timelines.
PTO Calculator - Track Leave Accrual & Balance by Country
Track PTO across countries. Free calculator for accrual, leave taken, and ending balance using working days and real public holiday data.
Salary Proration Calculator - Prorate Pay by Working Days & Holidays
Running payroll across countries? Prorate salary by working days with real public holiday data. Free calculator for partial periods and international teams.
Working Hours Calculator - Calculate Hours by Country & Schedule
Need working hours for a month or year? Free calculator by country with real public holiday data and custom work schedules.
Free Holiday & Business Days API - 1000 Requests per Month
Free holiday API and business days API - 1000 requests per month. Real public holiday data for developers. No credit card required.
Business Days Calculator - Working Days by Country, Region & Holidays
Need business days between dates? Free calculator with real public holiday data for any country. Try it online or integrate via API.
Welcome to HolidayDB Blog
Introducing our blog where we share insights, updates, and articles about holiday and vacation data, API development, and public holidays worldwide.