تبدیل تاریخ قمری

پارامترها

• date default: today Gregorian day to convert, YYYY-MM-DD (years 1900 to 2100).
• year optional with month: that Gregorian month as a day-by-day map; alone: the full year (366-day budget).
• month optional 1 to 12, combined with year.
• hy reverse Hijri year, 1317 to 1523 (≈ Gregorian 1900–2100) — switches the direction to Hijri → Gregorian.
• hm reverse Hijri month, 1 (Muharram) to 12 (Dhul Hijjah).
• hd reverse Hijri day, 1 to that month's real length (checked); omit it for the whole month as a day-by-day map.
• calendar default: moonsighting values: "moonsighting" (global crescent sighting) · "iran" (official reckoning; outside its table — after 19 March 2028 — it answers as moonsighting and says so in calendarUsed).
• offset default: 0 -2 to 2 whole days — the conventional local-sighting adjustment, applied before Gregorian → Hijri conversion only.