Date axis in matlab heatplot

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Here is my scirpt to make temp of different date.

%%"date" is a matix which show values of date. For that I have converted the dates into number in excel and using those numbers to plot

%% 'b' show the different locations for those I am plotting the airtemp.

%% "temp" is a matrix having the temperature of different location at different dates.

heatmap(date,b,temp);
annotation('textarrow',[1,1],[0.5,0.5],'string','T(°C)','FontSize',16,...
    'HeadStyle','none','LineStyle','none','HorizontalAlignment','center',...
    'FontName','Times New Roman','FontWeight','bold','TextRotation',90);
colormap(flipud(pink));
title({('T')});
names_1= {'Point 1','Point 2','Point 3','Point 4','Point 5','Point 6','Point 7'};
ax = gca;
ax.YData=names_1;
ax.XLabel='Date';
ax.FontSize = 16;
ax.FontName='Times New Roman';