Current location - Trademark Inquiry Complete Network - Trademark registration - Today, in the physical geography class, I saw that the courseware said the son of DJF· Mam ·JJA and four climate labels. What do they mean?
Today, in the physical geography class, I saw that the courseware said the son of DJF· Mam ·JJA and four climate labels. What do they mean?
1 February,1month and February (DJF)

March, April and May (spring)

June, July and August (JJA),

September, October and November (son)