/** Parse a calendar day ("YYYY-MM-DD…" or any Date-parseable value) into a
 *  local Date at noon, or undefined when empty/invalid. */
export declare function parseCalendarDate(v: unknown): Date | undefined;
/**
 * True when a serialized value is a pure CALENDAR DAY: `YYYY-MM-DD`, or that day at
 * exactly UTC midnight (how the backend serves a `date` column). Anything with a
 * real time of day is an INSTANT: a `timestamptz` shown with a day-only renderer
 * must be read in the organization's zone, or an evening invoice (29 Sep 19:41 in
 * Mexico City = 30 Sep 00:41Z) shows as the 30th (PIT-025).
 */
export declare function isCalendarDayValue(v: unknown): boolean;
/**
 * Today's calendar day ("YYYY-MM-DD") in `timeZone` (IANA, e.g. the org's
 * `America/Mexico_City`), or in the browser zone when absent/invalid. A form
 * that seeds «hoy» must use the org's day, not UTC's: at 19:00 in Mexico City
 * UTC is already tomorrow.
 */
export declare function todayInZone(timeZone?: string, now?: Date): string;
/**
 * A field default that names «today» instead of a fixed day: `$today` (the
 * token flows already use) or `today`. Case-insensitive.
 */
export declare function isTodayToken(v: unknown): boolean;
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