want the avg_days of days(datetime format )using movmean

t1 = datetime(2020,01,22)

t2 = datetime(2021,03,26)

days=t1:caldays(1):t2

through this code i made the datetime of size 1*430

now i want to find the avg_day using movmean but getting the error

Error using builtin

Invalid data type. First input must be numeric or logical.

Error in datetime/movmean (line 105)

y = builtin('_movmeandt', args{:});

Error in total (line 10)

y = movmean(days, hours(24), 'SamplePoints',t)

[Steven Lord]

What is the average of yesterday and a week from tomorrow?