Function cronDomMatchesNow

packages/server/src/services/schedule/utils.ts:415–442

(cronExpression: string, date: Date = new Date(), timezone: string = 'UTC')

 * original expression contains no `L` (no filtering needed).
 */
export const cronDomMatchesNow = (cronExpression: string, date: Date = new Date(), timezone: string = 'UTC'): boolean => {
    const parsed = _parseCronFields(cronExpression)

    // Extract DOM, month, year in the schedule's timezone so leap-year and
    // DST month boundaries are honoured.
    let dom: number, month: number, year: number
    try {
        const fmt = new Intl.DateTimeFormat('en-US', {
            timeZone: timezone,
            year: 'numeric',
            month: 'numeric',
            day: 'numeric'
        })
        const parts = fmt.formatToParts(date)
        const get = (type: string) => parseInt(parts.find((p) => p.type === type)?.value ?? '0', 10)
        dom = get('day')
        month = get('month')
        year = get('year')
    } catch {
        dom = date.getUTCDate()
        month = date.getUTCMonth() + 1
        year = date.getUTCFullYear()
    }

    // Day 0 of next month == last day of current month.
    const lastDay = new Date(year, month, 0).getDate()
    return _matchDomField(parsed.domField, dom, lastDay)
}

// ─── Visual Picker helpers ────────────────────────────────────────────────────