A bad night’s sleep on Sunday, the start of a new project and changing weather over the weekend can all affect what happens on site on Mondays.

'The ‘Monday effect’

Various studies across different regions confirm the “Monday effect” in construction. For example, a Chinese study found fatal accidents were 12.6% more common on Mondays compared with other weekdays. There was a similar trend in Spain and Hong Kong.

We also see the “Monday effect” in other industries, such as agriculture, forestry, mining and manufacturing.

A Spanish study that looked at the records of nearly 3 million occupational accidents, including construction, confirmed the Monday effect across industries, in companies of all sizes, for all types of workers, and for different types of injury.

Combined data of all occupational accidents in Queensland also confirms the Monday affect.