If $$15^{}\text{th}$$March is Monday, what day of the week is $$26$$\textsuperscript{th} March ? 
Overseas Competition->Knowledge Point->Word Problem Modules->Periodic Problems->Periodic Problems of Time
There are 11 days between $$15^{}\text{th}$$March and~ $$26$$\textsuperscript{th} March.  11 days = 1 week and 4 days.  Therefore,~~$$26$$\textsuperscript{th} March is Friday. 