As per my understanding Zinc trades both in the morning session and the evening session. On 29th Mar 2018, there was a holiday for the morning session, but the evening session was open as per the calendar at: https://www.mcxindia.com/market-operations/trading-survelliance/trading-holidays .
But for the Zinc contract with Expiry on 30MAR2018, there are no prices for 29th Mar 2018 in the Bhav Copy shown here: https://www.mcxindia.com/market-data/bhavcopy . What is the reason for this? Or am I missing something?