tation imposed by the superior epoch.</p><p>In 1280, the <i>Sh&#242;ush&#237;</i> almanac (授時曆) was created and the superior epoch was abandoned. This almanac was used from 1281 to 1368. When the Ming dynasty was established in 1368, it was renamed as the <i>D&#224;t&#466;ng</i> almanac (大統曆), but <i>D&#224;t&#466;ng</i> almanac was the same as the <i>Sh&#242;ush&#237;</i> almanac with only a small modification. It was used until 1644. So the <i>Sh&#242;ush&#237;</i> almanac was used for more th