How to set datetime for every 9.9156 days?

I have 255 length of data. and the first row of data I have date time 1-Jan-1993 0:00:00. how to set the datetime which interval is 9.9156days from this date 1-Jan-1993 0:00:00 ? can anyone help me? below is my coding

clc;clear;close all;

A=load('Topex-SLA.txt');
L = length(A);

t= datetime(1993,1,1,0,0,0,'TimeZone','GMT+8');
t1 = t + hours(1:r)'

Answer 1

[Fangjun Jiang]

t2= datetime(1994,1,1,0,0,0,'TimeZone','GMT+8');
t:days(9.9156):t2

Answer 2

[Steven Lord]

Do you want a certain number of 9.9156 day intervals from your starting time, or do you want intervals of length 9.9156 days starting at your start time and ending on or before a desired ending time? Both cases are shown on this documentation page though in different sections.