The India Meteorological Department recognizes four seasons: Winter (Dec–Feb), Pre-monsoon/Summer (Mar–May), Monsoon (Jun–Sep), and Post-monsoon (Oct–Nov).

Occurs during the remaining months, often characterized by lower humidity and clear skies. Specific Regional Calendars

The seasons are reversed:

The concept of "seasons" derives from the Earth's axial tilt relative to its orbital plane around the Sun. While the physical changes in weather and daylight are universal, the calendar assignment of these changes into specific months is a human construct. Consequently, the question "what are the seasons months" requires distinguishing between two primary systems of classification: the astronomical calendar and the meteorological calendar. This paper focuses on the standard Gregorian calendar assignments used in North America and Europe.