Once every 823 years
There were 52 Sundays and Fridays. There were 53 Saturdays.
Exactly 14% of all Decembers have five of each of Fridays, Saturdays and Sundays.
actually 2005 had 5 Fridays Saturdays and Sundays in July
Every year has more than 5 Fridays, 5 Saturdays and 5 Sundays.
According to my desktop calendar, July will have five Fridays and Saturdays (and even some Thursdays) in 2016, 2021, 2022, 2027,2032, 2033, etc... If you look at http://www.timeanddate.com/calendar/monthly.html?year=2021&month=7&country=1 you will see that 2021, 2027, 2032 do not have 5 Sundays. The other years 2016, 2022, 2033 do have 5 Fridays, Saturdays, and Sundays. You are little confused since your first parahraph discusses Fridays and Saturdays, in which case 2021 and 2022 do indead have 5 Fridays and 5 Saturdays in July. In paragraph two above, you begin talking about Sundays and which years in which July will 5 each of Fridays, Saturdays and Sundays. Every month with 31 days will have 5 instances of the first 3 days in the month. This will repeat in a 5-6-5-11 year cycle and then repeat. So it should be 2016, 2022, 2033, 2039, 2044, 2050, 2056 - don't forget to consider leap year which will cause a 1 day shift.
Using MS Works calendar - the last time it happened was in 2004. The next time will be in 2021 !
Fridays,Saturdays and Sundays. Mostly on Fridays tho. comes on at 8/7 central
March
About twice each year
It has 5 Fridays, 5 Saturdays and 5 Sundays.
ummm...never.
Mondays-Fridays 9pm Saturdays & Sundays 6pm