The organization is operational 24x7. You will always find someone plugged-in. Organize yourself however you see fit.
We'd encourage you to optimize for your Flow State and focus on enjoying work. Productivity is its mere symptom.
Recommended read: Maker's Schedule | Paul Graham
Working remote != work alone
Block 6 PM -7 PM IST slot for your team. They can use your time to remove roadblocks. You can do the same when with them, when you need unblocking.