The right pronunciation of “January” is “jan-you-wary”, with the emphasis on the second syllable. The phrase is derived from the Latin phrase “Januarius”, which was named after the Roman god Janus. Janus was the god of beginnings and endings, and January was the primary month of the Roman calendar.
The pronunciation of “January” has remained comparatively unchanged over time. The phrase was first recorded in English within the 14th century, and it has been pronounced in the identical means ever since.