Forgive the rant, but: 

If you are spending more than 12 hours at your workplace (barring exceptional circumstances), that would mean that either your organization’s culture is poor or/and systems are outdated or/and processes are lethargic or/and you are inefficient (you need training, thus) or you are a psycho (you need a psychiatrist).

If you are spending more than 12 hours at your workplace, you are a liability. 

You are not an asset for the organization. Even if you are thought so by some, you are a depreciating asset. You are an asset with high maintenance, high peripheral costs. You set the wrong example. You vitiate the entire atmosphere. You ensure that the wrong people are promoted and the better employees leave for better organizations. You are not only a liability for your organization, but even for your family. You are setting a wrong example even for them.

If you are spending more than 12 hours at your workplace, you are taking the human civilization backwards. 

There was a time when the 4 day work week seemed like a probability. That everyone would have enough time on their hands to pursue their hobbies, pursue their passions. That everyone could have a side-project that could further the civilization. But people like you killed it. That dream. You made people more aggressive, more greedy. Unnecessarily.

If you are spending more than 12 hours at your workplace, you are already dead. 

Telling someone publicly that you work more than 12 hours does not make you appear smarter in front of your colleagues. Whatever they might say in front of you, they pity you behind your back. They pity that you do not have a life outside work. They pity that you do not realise that in all probability you would not be remembered by your own family in 200 years time.

They pity that you don’t realise that you are already dead and inconsequential.