Question: why there are just 28 days in february

title: February
text: The Roman month Februarius was named after the Latin term februum , which means purification , via the purification ritual Februa held on February 15 ( full moon ) in the old lunar Roman calendar . January and February were the last two months to be added to the Roman calendar , since the Romans originally considered winter a monthless period . They were added by Numa Pompilius about 713 BC . February remained the last month of the calendar year until the time of the decemvirs ( c. 450 BC ) , when it became the second month . At certain intervals February was truncated to 23 or 24 days , and a 27 - day intercalary month , Intercalaris , was inserted immediately after February to realign the year with the seasons . 

Answer: answer: January and February were the last two months to be added to the Roman calendar , since the Romans originally considered winter a monthless period .
At certain intervals February was truncated to 23 or 24 days , and a 27 - day intercalary month , Intercalaris , was inserted immediately after February to realign the year with the seasons .