How do I change the first day of the week to Monday, last day Sunday, so if I select "this week" or "last week" in custom reports, it returns with the correct timeframe?

You're unable to change the default first day of the week, Paultraynor1985.

You can customise the report, change the starting day, then save it as a workaround. This way, you can easily open it without returning to the correct time frame.

Here's how:

1. Open the report.
2. Make some changes.
3. Click Save customisation.
4. Fill in the necessary fields.
5. Click Save. 

This report will be found under Custom reports. For more details, you can check this article. 

Shoot a comment below if you have other concerns. We'd be happy to help you. 

Hi @paultraynor1985 

This is not a fix but may be an explanation - my guess is that this is a carryover from QB Desktop.

Although I rarely use This Week or Last Week reports, I do use the keyboard shortcuts:

   w for start of week - i.e. Sunday

   k for end of week - i.e. Saturday

   + for next day

   - for previous day

So, Monday is W+ or K++ depending on direction.

It's so ingrained that I don't give it a thought but, you're right, it goes against common (business) practice.

Why is the default first day set to be Sunday rather than Monday on Quickbooks? I would have thought that the huge majority of UK businesses work to a Monday to Sunday week, so keeping the weekend together, rather than the strange custom of splitting each weekend (the reasoning is in the title after all!) with a Sunday to Saturday week.

Surely, like other global apps, there should be a setting to change the week starting day