My body clock has got tuned into regular weekday shifts from 9 to 6. I am not comfortable working nights and weekends on a regular basis, unless there is some urgent deliverable or a resource crunch in the team, I will surely pitch in. But working odd shifts is not good for the mental and physical health of employees and I hope you understand the same. Yet, if the company needs my presence mandatorily at night or during the weekend for continued growth and success, I will definitely work for it.