As the public holiday falls on a Thursday this year, experts are predicting a significant increase in sick days on Friday, with cold and flu, gastro, and COVID-19 being the most common excuses. Data from a sick certificate app shows that Mondays and Fridays are typically the most popular days for sick leave, with a noticeable rise in mental health days over the past three years. Employers are reminded to be aware of their obligations and the required evidence for sick leave.