Holmesian powers of observation

Although the Mozzie was introduced into squadron service as a night fighter as early as 1942, and in spite of the immense and rapid developments in aircraft production on both sides during the next few years, it was still the best night fighter in use anywhere when the war ended three years later. […] They had decided to install in our beautiful Mozzies, in fact in all the first batch of Mozzies to reach squadrons, a wretched new mark of AI.

Except for Easter, isn't March kind of a nothingburger (unless your birthday is in it!) month?

breachings of decorum