import type { TimeUnit } from '../unit';
/**
 * Parse a timestamp value into a number expressed in `units`. Accepts:
 *   - finite numbers (treated as **already** a timestamp in `units`; not
 *     re-interpreted as ms or seconds)
 *   - any string accepted by `Date.parse` (ISO 8601, RFC 2822, etc.) —
 *     converted from ms to `units`
 *
 * Returns null for empty / whitespace-only strings, NaN/Infinity numeric
 * input, unparseable strings, pre-epoch results (negative timestamps), and
 * any result outside the safe integer range.
 *
 * @param value		Timestamp value to parse.
 * @param units		Target unit. Numeric inputs are treated as already in
 *					this unit; date-string inputs are converted from ms.
 *
 * @category Time Parsing
 */
export declare function timeValueParseDate(value: number | string, units: TimeUnit): number | null;