In article ,
P van Rijckevorsel wrote:
Maybe as botanists we should adopt the biological 10 day "week".

Howard Clase

How many restdays in a 10 day week?
PvR

Anything from 2 to 4 depending upon how many Saturdays and Sundays it
includes:-)

Some time ago somone pointed out that curious irregularities in bird
reports analysed on a ten day basis could be evened out if you took into
consideration the fact that most bird watchers are amateurs and went out
mostly at weekends!

Howard.