datetime InputFormat error in R2021a but works in R2017b ?

Hello, using datetime in R2021a brings an error while the same task works in R2017b, Is there a way to fix the issue in the newer version?

b=string('2004Q1');

In R2017b

c=datetime(b,'InputFormat','yyyyQQ')

c = 

  datetime

   01-Jan-2004

In R2021a

c= datetime(b,'InputFormat','yyyyQQ')
Error using datetime (line 647)
Unable to convert '2004Q1' to datetime using the format 'yyyyQQ'.

Answer 1

[Star Strider]

That seems to have changed between releases. In R2021a, it’s necessary to use 'QQQ' to designate ‘long format’ quarters —

b=string('2004Q1');
c= datetime(b,'InputFormat','yyyyQQQ')

c = datetime
   01-Jan-2004

See Format for details.

.

[Star Strider]

As always, my pleasure!

Yes. I linked to them in my Answer. (At least I believe that’s the information you want. If it isn’t, post back with a description, and I’ll look again.)

.

Answer 2

[Haiqin Liu]

I tried but it still won't work: Unable to convert '2004Q4' to datetime using the format 'yyyyQQQ'.

[Star Strider]

That is a valid display format.

It is not a valid input format.