How to create datetime based on the folder sequence?

I have a folder containing each day of a year. I want to generate date based on the folder name.

folder [2019]

subfolder [001]-[002]-.........-[365]

like for folder [001], it will generate [ 01-Jan-2019], for folder [365], it will generate [ 31-Dec-2019],

how can I do that?

[Thomas DiSantare]

The question is not entirely clear

Answer 1

[Walter Roberson]

foldername = '2019';
subfoldername = '365';
datetime(str2double(foldername), 1, 1, 'format', 'dd-MMM-yyyy') + days(str2double(subfoldername)-1)

ans = datetime
   31-Dec-2019

Note that this is strict on day of the year. On a leap year, day 365 would be 30-Dec .

[M M Nabi]

Thanks @Walter Roberson