The Dhirubhai Ambani Knowledge City (DAKC) is primarily a corporate and educational campus, so the best "time to go" depends entirely on your purpose for visiting.
If you are attending a business conference, training, or an event, the best time to go is simply when your event is scheduled. The campus facilities, including meeting rooms, accommodation, and dining, are designed to cater to attendees year-round.
For those visiting DAKC for a specific academic or research purpose, such as a workshop or collaboration at one of its institutions, your visit will naturally align with the academic calendar or project timelines. The campus provides a conducive environment for focused work, irrespective of the season.
Considering the climate in Mumbai, if you have flexibility and are planning an extended stay that might involve some leisure time outside the campus, the cooler, drier months from November to February are generally more comfortable. The monsoon season (June to October) can bring heavy rains, which might affect travel to and from the campus, while the summer months (March to May) are typically hot and humid.