My ancestors had a phrase that has become the popularized saying "today is a good day to die"
Hokahey
Crazyhorse being the badass he was, would yell it when charging into battle.
It's not really meant as "time to die" but more of I am ready! I am brave. I am strong. I love my family and they love me. If today is the day, so be it. I am ready for judgement!
The Lakota were the badasses that forced the US Army to surrender. The Dakota areas would be a much different place if they had the numbers to stop people from using the Oregon Trail.
So the Klingons using that phrase has always been a lovely thing