Sym454 -9000 -8000 -7000 -6000 -5000 -4000 -3000 -2000 -1000 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1430 1440 1450 1460 1470 1480 1490 1500 1510 1520 1530 1540 1550 1560 1570 1580 1590 1600 1610 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1660 1670 1680 1690 1700 1710 1720 1730 1740 1750 1800 1900 2000 2024 2100 2200 2300 3000 January February March April May June July August September October November December -- starts at 1638-01-04