Akshaya Tritiya, also known as Akha Teej, is a holy day for Hindus and Jains. It falls on the third Tithi (lunar day) of Bright Half (Shukla Paksha) of the pan-Indian month of Vaishakha and one of the four most important days for Hindus. It is an auspicious day of the birthday of Lord Parasurama who is the sixth incarnation of Lord Vishnu. On this day Veda Vyas and Lord Ganesha began to write Mahabharata.
In Jain and Hindu calendars, some days of the month are absent in counting and some days (tithi in lunar calendars) come extra, but Akshay tritiya is one day which is never "absent" from the lunar calendar.
The word "Akshaya" means the never diminishing in Sanskrit and the day is believed to bring good luck and success. It is believed that if you do charity on this day you will be blessed. On Akshay Tritiya, Mrutika worshiped.
Nowadays jewellers have turned the purity into a marketing gimmick. The day is considered auspicious for starting new ventures. The legend is that any venture initiated on the auspicious day of Akshaya Tritiya continues to grow and bring prosperity. Hence, new ventures, like starting a business, construction, etc. is performed on Akshaya Tritiya.