original date: reconstructed date month day year julian day month day year december 31 -1 1721423 december 31 -1 january 1 1 1721424 january 1 1 october 4 1582 2299160 october 4 1582 october 15 1582 2299161 october 15 1582 january 17 1706 2344180 january 17 1706 april 14 1865 2402341 april 14 1865 april 18 1906 2417319 april 18 1906 may 7 1915 2420625 may 7 1915 july 20 1923 2423621 july 20 1923 may 23 1934 2427581 may 23 1934 july 22 1934 2427641 july 22 1934 april 3 1936 2428262 april 3 1936 may 6 1937 2428660 may 6 1937 july 26 1956 2435681 july 26 1956 june 5 1976 2442935 june 5 1976 may 23 1968 2440000 may 23 1968