@burglekitt/gmt/dist/utc/parse/parseDayFromUtc.js

Temporal-based date and time utilities with timezone support and polyfill integration

import { Temporal } from "@js-temporal/polyfill";
import { isValidUtc } from "../validate/index.js";
/**
 * Return the day of month (1-31) from a UTC datetime string.
 *
 * - Returns zero-padded string for day.
 * - Returns "" for invalid input.
 *
 * @param value ISO UTC datetime string (e.g., "2024-03-17T14:30:45Z")
 * @returns Day (01-31) or "" on invalid input
 *
 * @example parseDayFromUtc("2024-03-17T14:30:45Z") // "17"
 * @example parseDayFromUtc("invalid") // ""
 */
export function parseDayFromUtc(value) {
    if (!isValidUtc(value))
        return "";
    try {
        const instant = Temporal.Instant.from(value);
        const dateTime = instant.toZonedDateTimeISO("UTC");
        return dateTime.day.toString().padStart(2, "0");
    }
    catch {
        return "";
    }
}