>>12025082Modern Science
The age of the univese as estimated by the x-ray telescope is 13.7 billion years, more precisely measurement of the age of the universe is
13.798 ± 0.037 billion years ((13.798 ± 0.037) × 10e9). This is the most exact measurement that we have observed (used lambda CDM concordance Model).
So month and year measurement will be much blurred.
For an approximate answer i may answer you it was 1st April,13.798billion BC.