Sym454 -8000 -7000 -6000 -5000 -4000 -3000 -2000 -1000 0 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2026 2100 2200 2300 2400 2430 2440 2450 2460 2470 2480 2490 2500 2510 2520 2530 2540 2550 2560 2570 2580 2590 2600 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2650 2660 2670 2680 2690 2700 2710 2720 2730 2740 2750 2800 2900 3000 3100 3200 3300 4000 January February March April May June July August September October November December -- starts at 2630-01-04