Where can I change the time format?

language\en-GB\en-GB.ini

I tried to replace line:<DATE_FORMAT_LC2="l, d F Y H:i"> in en-GB.ini
with:
<DATE_FORMAT_LC2="%a, %d %b %Y">
and
<DATE_FORMAT_LC2="l, d f Y">
No effect.

It's not in language files for Responsive template, but in template override files. In example, to edit the blog item's date format, edit file /templates/hot_responsive/html/com_content/category/blog_item.php and change line
Here, 'd f Y' represents date format. You can also edit other template overrides, for the articles or featured articles using similar method.

Can you tell me exactly file? please forgive my stupid, I've searched over and over again, still can't find the position.

I don't want to show time, only date as I said before.

Thank you very much!

File is this:

/templates/hot_responsive/html/com_content/category/blog_item.php

The code I mentioned is around line 104.

I replace the line 104:
With:
and:
Still change nothing. and this line have not WEEKDAY and TIME description, but the weekday just display before date and the time after date

in my website front end.