Sym454 -10000 -9000 -8000 -7000 -6000 -5000 -4000 -3000 -2000 -1000 -900 -800 -700 -600 -500 -400 -300 -200 -100 0 100 200 300 400 460 470 480 490 500 510 520 530 540 550 560 570 580 590 600 610 620 630 640 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 690 700 710 720 730 740 750 760 770 780 800 900 1000 1100 1200 1300 2000 2025 January February March April May June July August September October November December -- starts at 0669-01-04