It was actually 15 years, as The Mulan Parade was created as a night parade that ran at night in 1998 and 1999.
After that Disneyland had Fantasmic!, plus a big fireworks show, plus whatever afternoon parade was running at that time.
DCA had an afternoon parade and then the Electrical Parade at night to play against the fireworks and Fantasmic! next door.
In 2015, before Fantasmic! was closed for its Fantasmic! 2.0 upgrade due to the Star Wars Land construction, the daily peak DLR schedule was this, all within a 5 to 10 minute walk from each other in two adjacent theme parks;
3:30 PM - Mickey's Soundsational Parade (Disneyland Park)
5:00 PM - Pixar Play Parade (DCA Park)
5:45 PM - Mickey's Soundsational Parade (Disneyland Park)
8:45 PM - Paint The Night Parade (Disneyland Park)
9:00 PM - Fantasmic! (Disneyland Park)
9:00 PM - World of Color (DCA Park)
9:30 PM - Disneyland Forever! fireworks spectacular (Disneyland Park)
10:15 PM - World of Color (DCA Park)
10:30 PM - Fantasmic! (Disneyland Park)
That's three different parades performed five times per day, plus two different water shows performed four times per day, plus a fireworks show inbetween. In two
little, tiny theme parks jammed in just 100 yards from each other.
That's nine (9) daily offerings of parades and night spectaculars.
Meanwhile, at WDW, there are currently two parades with three performances per day (1 FOF, 2 MSEP), plus two water shows with one performance each (1 Fantasmic!, 1 ROE), and two fireworks shows (1 Wishes, 1 Star Wars).
That's seven (7) daily offerings of parades and night spectaculars. In four
HUGE theme parks sprawled across a massive piece of property that in 1966 Walt said would offer
"the blessing of size". From a Parks & Resorts division that created $994 Million in after-tax profit in the last Fiscal 2016 quarter, just 90 days of business.
Assuming WDW's four parks would double the offerings of DLR's two parks, you would think WDW would have 18 daily offerings of various parades, fireworks and water shows. It's fascinating to consider that WDW has recently offered less daily performances of parades and night spectaculars than Disneyland Resort has. How do you even justify that if you are TDO?