Sym454 -9000 -8000 -7000 -6000 -5000 -4000 -3000 -2000 -1000 0 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1560 1570 1580 1590 1600 1610 1620 1630 1640 1650 1660 1670 1680 1690 1700 1710 1720 1730 1740 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1790 1800 1810 1820 1830 1840 1850 1860 1870 1880 1900 2000 2024 2100 2200 2300 2400 3000 January February March April May June July August September October November December -- starts at 1768-01-04