Nager.Date vs Namedays Calendar
Same instrument, two spec sheets — measured, not claimed.
Nager.Date vs Namedays Calendar: common questions
Which is more reliable, Nager.Date or Namedays Calendar?
On our scheduled checks, Namedays Calendar leads on measured uptime — Nager.Date at —% versus Namedays Calendar at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Do Nager.Date and Namedays Calendar need an API key?
Neither needs a paid key — Nager.Date is callable with no signup, and Namedays Calendar is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Nager.Date and Namedays Calendar from the browser?
Yes — both Nager.Date and Namedays Calendar send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are Nager.Date and Namedays Calendar free for commercial use?
Nager.Date has unclear commercial terms, and Namedays Calendar has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.