Could the Grand Canyon be formed in months

If not what is a good reason for your hypothesis?

hy·poth·e·sis/hīˈpäTHəsis/
Noun:
A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
A proposition made as a basis for reasoning, without any assumption of its truth.

There is an outside possibility that an earthquake ripped the north rim and south rim apart, and that rainwater going down the walls of the canyon over millenia smoothed the rocks instead of erosion by a river.

So it would have been formed in months, but not reached its present form for eons.

There are smaller fissures in the earth thanks to shifts that happen during earthquakes.

{shifting tectonic plates - which can and do also make mountains, and allow for lava up-flow to create volcanic mountains.}

The origin of Grand Canyon is a mystery unexplained by uniformitarian geology. In order to solve that mystery, uniformitarian scientists would like to know the date of its origin. The date for Grand Canyon started off older than 70 Ma. Then the western and central portions of the Canyon were dated as 5 to 6 Ma old—a date always uncomfortable with uniformitarian scientists since it implied rapid erosion within their paradigm. Recently, the Canyon has been redated, twice. One dating technique discovered that the western Canyon was about 17 Ma old. Another found that the western and central portions are 55 to 65 Ma old. Those who believe that the canyon is only 5 to 6 Ma claim these new dating methods are flawed, while the advocates of the new dating techniques claim the opposite. Regardless, none of these dates help resolve the origin of Grand Canyon from a uniformitarian point of view—all hypotheses have serious problems. Vertical cliffs and lack of talus indicate the Canyon is young, suggesting a catastrophic origin. The dam-breach hypothesis is currently the most popular creationist hypothesis, but it has numerous problems, two in particular that seem fatal. A second creationist hypothesis originates the Grand Canyon during late Flood channelized runoff.

No. Reason: It was formed by erosion, and erosion could not have formed the canyon that quickly.

sum scientists have recently speculated that the grand canyon was formed by a massive flash flood

No scientist believe that the Grand Canyon took 2.7 billion years to be formed.