Thanks for everything @alberto.

thank you so much for your response. I have cleared my questions.

Then how to convey the community to use new one ?

Thank you @alberto and let's say If I developed one social media platform and successfully deployed on live network. After some days I updated the code and migrate --reset and deployed again (the new JSON) to the live network. Does it means previous smart contract works perfectly fine ? new one is act as new smart contract ?

@Ismael thank you. I will check and come back with the proper outputs...

@phant0m can your please tell the other possibilities of storing time with that record ?

@Ismael , I have checked again there is no difference in my pc date and if it is UTC then the difference is just 5.30 hrs right ?

Got it and its clear explaition. Thank you @Lauri Peltonen

Thanks for your response @SanjaySB . I will go through that above link and will get clarification.

Thanks for your explanation @Lauri Peltonen . Let's say there is a huge traffic to my dapp its around 1cr active nodes in my dapp. How much time it will take to validate by all 1 cr nodes for single transaction. ?

I am using Ganache