Getting the a day of a month based on Vac(day,month)

Currently, I'm trying to write a program to get both day and month information and as a result, show how the month x list will be arranged if it starts with the given number. For example, I could get this with (31.3), but my problem is that I cannot make it dynamic based on numbers and the start of the month doesn't change. Would it be better to write it with a 1D array?

day = input(promptDay);
nday = input(promptNday);
x = zeros([1,35]);
Cnt = 1;
for i = day:nday+day - 1
for j = 1:5
for k = 1:7
if x (j*k) == 0
disp(' ')
else 
disp (x(j*k)
if [i] == zeros
 disp(' ')
x (i) = Cnt; 
Cnt = Cnt + 1;
end

Answer 1

[Chunru]

calendar(2021, 3)

                   Mar 2021
     S     M    Tu     W    Th     F     S
     0     1     2     3     4     5     6
     7     8     9    10    11    12    13
    14    15    16    17    18    19    20
    21    22    23    24    25    26    27
    28    29    30    31     0     0     0
     0     0     0     0     0     0     0

[Mohammad Hasani]

I don't want to use built in calendar. That's why I wrote those lines.