When did thomas edision invented the light bulb?

October 22, 1879.

However, Edison did not invent the light bulb, it is a matter of documented record that Swan obtained a UK patent covering a partial vacuum, carbon filament incandescent lamp in 1860.

Thomas Alva Edison patented his invention in 1879, almost 20 years later, the same year that Swan's bulbs were in domestic use in England.