Sym454 -10000 -9000 -8000 -7000 -6000 -5000 -4000 -3000 -2000 -1000 -900 -800 -700 -600 -500 -400 -300 -200 -100 0 100 200 300 360 370 380 390 400 410 420 430 440 450 460 470 480 490 500 510 520 530 540 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 590 600 610 620 630 640 650 660 670 680 700 800 900 1000 1100 1200 2000 2025 January February March April May June July August September October November December -- starts at 0568-01-04