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, Nager.Date leads on measured uptime — Nager.Date at 100% versus Namedays Calendar at 91.2% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, Nager.Date or Namedays Calendar?
Nager.Date has the lower median latency in our checks — Nager.Date responds in 56 ms versus Namedays Calendar at 480 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.
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?
Only Nager.Date is browser-friendly — it returns CORS headers over HTTPS. Namedays Calendar needs a server-side call or proxy, so factor that into which one fits a front-end project.
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.