premise: Singaporean President Sellapan Rama Nathan is due to arrive in Egypt on Tuesday on a four-day official visit, to coincide with the occasion marking the 40th anniversary of establishing diplomatic ties between Egypt and Singapore, Egyptian news agency MENA reported on Monday.
  During his visit, President Nathan is scheduled to meet Egyptian President Hosni Mubarak, in which the two top leaders will discuss various issues on economy, politics and trade.
  Another main topic of their talks will be ways to promote an Asian-Middle East dialogue which Singapore hosted last year, said the report.
  Singaporean President will also have talks with Egyptian Prime Minister Ahmed Nazif and other officials during his stay in Egypt.
  Singaporean President will be accompanied by a delegation comprising the minister of Information & Communication, minister of state for foreign affairs and a number of other officials and businessmen.
   What does his stay refer to?
hypothesis: arrive in Egypt on Tuesday