Data Source

Calendar grid data is generated from Hamro Patro and committed as lib/bs-day-picker/data/bs-calendar.json.

Regenerate data

From the monorepo root:

# Scrape Hamro Patro (rate-limited; resumes from .cache/hamropatro/)
pnpm data:scrape -- --years 2080-2089

# Build full dataset (legacy grid + scraped month overlays)
pnpm data:build

# Validate grid integrity and spot-checks
pnpm data:validate

Maintainers can also run Actions → Refresh calendar data to open a PR automatically. See Contributing — Data release.

Schema

type BsCalendarData = Record<string, Record<string, {
  daysInMonth: number
  weekdayOffset: number
  days: Array<{
    bsYear: number
    bsMonth: number
    bsDay: number
    adDate: string      // "2026-04-14"
    weekday: number     // 0 = Sunday
    events?: string[]
    isHoliday?: boolean
  }>
}>>

Year range

2000 – 2089 BS (matching Hamro Patro navigation).

Date + time pickers

BsDateTimePicker and toAdDate() resolve the Gregorian date from the same bs-calendar.json entries (adDate per BS day). If a day is missing from the dataset, getDayAdDate / toAdDate return null — handle that in submit handlers.

Attribution

Hamro Patro is the authoritative source for BS–AD mapping and festival labels. Re-scrape periodically to pick up calendar corrections.