Here's how to convert years to turns. This website only supports speedruns in terms of time, so we'll just track records based on hours. So a victory on turn 50, in 500 AD, would be 50 hours.

Turns Year 10 3000BC 20 2000BC 30 1000BC 40 0BC 50 500AD 60 1000AD 70 1250AD 80 1500AD 88 1700AD 108 1900AD 118 1950AD 143 2000AD 168 2050AD 193 2100AD