@types/es-abstract/helpers/timeConstants.d.ts

export const HoursPerDay = 24;
export const MinutesPerHour = 60;
export const SecondsPerMinute = 60;
export const msPerSecond = 1e3;
export const msPerMinute = 6e4;
export const msPerHour = 36e5;
export const msPerDay = 864e5;