Should I be worried about how old my new tyres are?

I just purchased four new tyres today. The date on the tyres is 1623. Should I go back and ask for 2024 tyres to be put on?

Are letters DOT required on new tyres?

Hi I have had Michelin crossclimate tyres fitted which have a code 0723 with a few other codes preceding it. However there are no letters DOT anywhere on either tyre. A search tells me the letters DOT...