In[]:=
makegrid[days_]:=​​Grid[​​Table[​​With[​​{x=i},​​{DatePlus[{2021,1,10},x],DatePlus[{2022,1,10},x],DatePlus[{2023,1,10},x]}],​​{i,1,days}]]​​makegrid[5]
Out[]=
{2021,1,11}
{2022,1,11}
{2023,1,11}
{2021,1,12}
{2022,1,12}
{2023,1,12}
{2021,1,13}
{2022,1,13}
{2023,1,13}
{2021,1,14}
{2022,1,14}
{2023,1,14}
{2021,1,15}
{2022,1,15}
{2023,1,15}