/** A span between two dates, as GitHub's range arguments take it. */
interface GitHubDateRange {
    /** Start of the range, inclusive. */
    from: Date;
    /** End of the range, inclusive. */
    to: Date;
}
/**
 * Format a date as a GitHub `DateTime` scalar.
 * Seconds precision, no milliseconds.
 *
 * @param date Date to format.
 * @returns e.g. `2024-01-01T00:00:00Z`.
 */
declare const toGitHubDateTime: (date: Date) => string;
/**
 * The full UTC span of a calendar year, both ends inclusive.
 *
 * The end matters to callers that would otherwise leave a range open:
 * GitHub's `contributionsCollection` defaults `to` to one year after `from`,
 * which pulls the next 1st of January into the year.
 *
 * @param year Four-digit year.
 * @returns The range covering it.
 */
declare const getGitHubYearRange: (year: number) => GitHubDateRange;
/**
 * Get diff in minutes between two dates.
 *
 * @param d1 First date.
 * @param d2 Second date.
 * @returns Number of minutes between the two dates.
 */
declare const dateDiff: (d1: Date, d2: Date) => number;
export { dateDiff, getGitHubYearRange, toGitHubDateTime };
export type { GitHubDateRange };
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