Lilambd Koyomi Range — Japanese Calendar Day Query

Choose this endpoint when you need to look up or filter traditional Japanese calendar days (koyomi), including rokuyō cycle days (大安, 仏滅, etc.), auspicious days (一粒万倍日, 天赦日), or seasonal solar terms (立冬, 冬至) within a specific date range. It is ideal for cultural event planning, scheduling in Japan, or any application that needs to annotate dates with traditional almanac significance. Prefer it over generic calendar APIs when Japanese cultural day-quality metadata is required.

• Missing required 'from' or 'to' parameters returns an error
• Invalid date format for 'from' or 'to' may return empty results or an error
• Unknown or misspelled 'has' filter values return empty results
• Invalid timezone string in 'tz' may cause unexpected results or an error
• Date range too large may return empty or truncated results
• Payment not authorised (x402) returns a 402 response before data is served