ON RECORD! Hotter years NOT considered prior to record keeping.
I did the math based on the estimated age of the planet (~4.5bn yrs), and their “record” is to the age of Earth what 1 second is to approximately 129 years.
Note: this is an extremely charitable comparison and assumes the accuracy and precision of temperature data collected when people were driving the Model T.
Records prior to satellites can not be compared to modern records.
All of the records prior to the weather satellites were either surface temperatures collected a few times a day at a given locations which were few and far between.
Then in the twentieth century balloons started to carry weather instruments into the upper atmosphere and again this was occasional and at few locations widely dispersed.
Any weather data pre-satellite is not comparable to modern data in any real way.
On geologic time scales we know that the world’s climate has been warmer than today and colder than today. It is pointless to assume that humans are causing the climate to warm because there is no real evidence to support that assumption.
Climate science is in its infancy with lots of theory and little proof.