How do I include a variable when trying to display a string?

I created a start time and saved it. I want to include this variable in the end of the string, but what I'm doing is not working. Here is my current code:

startHW1=datetime('now');

save HW1 startHW1

disp(['I started HW1 on ', num2str(startHW1)]);

Answer 1

[dpb]

Use the optional output format

startHW1=datetime('now','Format','dd-MMM-yyyy HH:mm:ss');
disp(['I started HW1 on ' startHW1])

or, just use now

startHW1=now;
disp(['I started HW1 on ' datestr(startHW1)])

(Addendum/Erratum: the need for datestr here sorta' defeats the purpose; my faux pas explained further in comment to Stephen...)

[Stephen23]

That second example does not make any sense:

>> startHW1=now;
>> disp(['I started HW1 on ' startHW1])
Warning: Out of range or non-integer values truncated during conversion to character. 
I started HW1 on 
>>

Why do you want to join character 736576 (or similar) onto the end of that string?

A datestr call is most likely required here...

[dpb]

Yeah, at the time was thinking that like date, now returned the string and belatedly realized it this AM...