caldays vs Hebrew Calendar
Same instrument, two spec sheets — measured, not claimed.
caldays vs Hebrew Calendar: common questions
Which is more reliable, caldays or Hebrew Calendar?
On our scheduled checks, caldays leads on measured uptime — caldays at 100% versus Hebrew Calendar at 99.44% 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, caldays or Hebrew Calendar?
caldays has the lower median latency in our checks — caldays responds in 217 ms versus Hebrew Calendar at 256 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 caldays and Hebrew Calendar need an API key?
Neither needs a paid key — caldays is callable with no signup, and Hebrew Calendar is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call caldays and Hebrew Calendar from the browser?
Yes — both caldays and Hebrew 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 caldays and Hebrew Calendar free for commercial use?
caldays has unclear commercial terms, and Hebrew 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.