method,expression,result,scope Same-side BC subtraction,2551 − 2091,460,Regular lifespan; no civil year-zero correction Supplied civil BC–AD span,2551 + 14010 − 1,16560,File 22 Nisan endpoints already selected Supplied civil BC–AD span,2091 + 14470 − 1,16560,File 22 Nisan endpoints already selected Standalone Nisan counterpart,1406 + 1406 − 1,2811,File 09 single-date example Paired autumn component,1407 + 1406 − 1,2812,File 09 paired Tishri/Nisan construction Paired spring component,1406 + 1407 − 1,2812,File 09 paired Tishri/Nisan construction