Canberra runs ahead of India, which turns the usual problem around. At 9 a.m. in the ACT it is 3:30 a.m. in India during daylight time and 4:30 a.m. the rest of the year, so a template written at your desk in the morning reaches Canberra after lunch, and its replies arrive while your team is still at work.
That suits utility updates sent as your systems produce them. It suits campaigns less well: schedule them for a Canberra morning rather than an Indian one, and keep the inbox staffed for the hour after they land. InfiQ's own support works India time, in English and Hindi.
A public-service city also has its own rhythms of work and leave. Write as you would to any professional contact: short, specific, and only to people who agreed to hear from you on WhatsApp.