Number 3 Number 3 is related to the largest planet, Jupiter. Birthdates on: 3rd, 12th 21st, 30th dates of any month. Lucky day: Thursday. (Guruwar) Number 3 is a sign of a Teacher. (Guru) Number 3 energy signifies wisdom, knowledge seekers, love, and good fortune. Number 3 is also a sign of self-expression, playfulness generosity … Continue reading Number 3 : Its 1 Of The Most Powerful Number.