India has such a wide array of growing zones, temperature variances, and soil types. This calendar is an overall guide to plan your sowings and planting by seasons. This document can be used as a general guideline across India depending on what are the monsoon or winter months of your specific region, because they may vary to a large extent by altitude, zones and overall location.
You can refer to it from a broader perspective as to what crops can grow rain fed, what crops can tolerate cooler growing months, and what crops can do well in summer.