Non sequitur haikus

[BigBlueHen53]

The first day of Spring?
Meteorological:
Is March First, of course!

Other first Spring day?
Well, that would be March 20:
Astronomical!

 

[Sally PB]

Non-haiku reason they're different, as explained by the chief meteorologist on the local station:

For studying averages and trends, scientists need hard, recurring dates. So meteorological spring is March-April-May.

Astrological spring varies. For the past 10 years, it's been sometime during the day or night on March 19th or 20th.

Too hard to say that
As haiku; I'm running late.
Time to walk Freya.