rtsis po che'i dngos po

previous planetary date coursing stong par zhugs rjes nges pa slar brtsams pa nas up to the present rgyun mi 'chad &, dus dang yul longs la 'das many years's hor khongs mi 'byung ba'i ched du the moth date to be calculated thog ma yan gyi 'phro bral dhru wa'i longs spyod ji tsam 'das pa bsdoms te sbyin dgos &, rgyud las ma 'ongs rab byung re re'i 'gor rtsis 'phro spo dgos par gsungs so, rtsis mgo bstung ba'i thad la ltos [IW]