It’s quite common when working with Google Sheets to have data set to US format (Month-Day-Year) without realising it. This is because Google will format your dates based on what ‘locale’ or language you have set – and the default is US English.

Instructions on how to change that are here – but what if it’s too late? What if you’ve already inputted or imported data which, when updated to a different format, will make it the wrong date? Continue reading →