Sym454 -8000 -7000 -6000 -5000 -4000 -3000 -2000 -1000 0 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2026 2100 2200 2290 2300 2310 2320 2330 2340 2350 2360 2370 2380 2390 2400 2410 2420 2430 2440 2450 2460 2470 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2520 2530 2540 2550 2560 2570 2580 2590 2600 2610 2700 2800 2900 3000 3100 4000 January February March April May June July August September October November December -- starts at 2497-12-30