The Officer Trainees organize four Zonal days during the Phase I programme. The purpose of organizing a Zonal Day is to acquaint the Officer Trainees with the culture and cuisine of their allocated cadres.
The details of constitution of groups for each zone are as follows:
| East Zone: | Assam- Meghalaya, Bihar, Jharkhand, Manipur- Tripura, Nagaland, Orissa, Sikkim, Bhutan and West Bengal cadres. |
| South Zone: | Andhra Pradesh, Karnataka, Kerala, Tamil Nadu and Telangana cadres |
| West Zone: | Chhattisgarh, Gujarat, Madhya Pradesh, Maharashtra and Rajasthan cadres |
| North Zone: | Haryana, Himachal Pradesh, J & K, Punjab, U.P and Uttarakhand cadres and AGMUT |
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