Kathmandu:- If you don’t have any good muhurta pre-calculated for your purpose, you can use the muhurta of the mid day (i.e. when the Sun is at the highest point in the sky at a particular location). This muhurta is called Abhijit muhurta and is universally good. Abhijit means great victory.
The reason why shastras recommend on this is because at mid day, the Sun is located three signs (equivalent to 6 hrs) behind the Lagna and thus will be located in the 10th house from the Lagna (each Rasi is a house with Lagna as the 1st house, the houses are counted in the zodiacal direction, 10th house represents one's karma and the success in it). Thus Sun being in the 10th house is auspicious for any activity.