Missing months in arima forecast

Hi, when using arima forcast and extracting data into an excel sheet I find that there are missing months, It gives me the forecast for January and jump into March, april, etc but It does not give the forecast for February.

The format of the date column is this "01/01/2019" and when I extract the forecast, the format of date contains hours.

Any idea of what is happening and how to solve it?