SanskarPandit If you use Diarium in Calendar view rather than Timeline, you can press and hold on today's date. You then have a context menu to give you the option of opening a current entry for the day or creating a new one. Each day can have multiple entries.
I find this really useful as I do the same as you and note stuff down as it happens. I write in the mornings, but then create additional entries during the day at work, or when I go out in the evenings. And of course, I tag these entries with the relevant tags to keep them organised.