HowManyDays.app

什么是 HowManyDays.app？

HowManyDays.app is a free collection of date and time calculators that run entirely in your browser — no sign-ups, no tracking, no ads. Calculate the exact days between any two dates, your age in days and weeks, workdays excluding weekends, time zone differences, moon phases, Chinese zodiac signs, countdowns and more. 13 tools and counting, each one instant, mobile-friendly and completely free.