Sym454 -8000 -7000 -6000 -5000 -4000 -3000 -2000 -1000 0 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 1970 1980 1990 2000 2010 2020 2025 2030 2040 2050 2060 2070 2080 2090 2100 2110 2120 2130 2140 2150 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2200 2210 2220 2230 2240 2250 2260 2270 2280 2290 2300 2400 2500 2600 2700 2800 3000 4000 January February March April May June July August September October November December -- starts at 2179-01-04