On the other hand, we are to be watchful for the signs of the times and be ready (also Matthew 24). IMHO, there is a risk in getting too concerned over the signs of the times because some may want to avert the discomfort of the end times prophesy. But that would be the wrong reaction as Peter discovered:
Gnosticism, OTOH, is based on man's knowledge - that would be the complete reverse, i.e. following the carnal nature as described in Romans 8.
IMHO, there is always a risk in embracing the reasoning of man as spiritual "truth" - whether from our own reasoning or from the reasoning of any other mortal. Personally, I choose to not embrace the doctrines and traditions of men (Mark 7:7, I Corinthians 3, Matthew 23).
But I have arrived at this point after decades of walking with the Lord. Likewise, I do not suggest others ought to be like I am. For one thing, some are more comfortable their whole lives trusting a religious establishment such as the Roman Catholic Church. Others are more comfortable putting their trust strictly in the Scriptures or in a particular interpretation thereof. And some may feel insecure and thus, not be quite ready to let go and let God.
I think "the day nor the hour" refers to Christ's appearing in the clouds or The Rapture.
And, it would appear that we MIGHT know the season or even the week or month??? Absolute conjecture, of course.
Certainly no secret knowledge involved!
Someone has calculated that ~75% of the Bible is about prophecy in one way or another.
The Bible is abundant in prophetic statements about the end times--abundant Scriptures that have yet to be fulfilled though that number seems to decrease at an increasing rate as the years go by.
We can pretend they aren't there. We can us a long list of man's notions; doctines of man; traditions of man; doctrines of demons; fantasies; wishful thinking . . . whatever to facilitate ignoring them and still sleeping . . . but that won't make those Scriptural truths go away or be the least bit inoperable.
We can quote whatever long list of RELIGIOUS leaders to comfort our biases and assumptions.
Christ wasn't impressed by such RELIGIOUS leaders and their TRADITIONS of men during His dusty pathed days. I think He will be even LESS impressed at His SECOND COMING.
To my mind, gnosticism is a lot closer to a kind of blind mumbo jumbo manipulating the text apart from the BREATHED TRUTH OF HOLY SPIRIT than is HOLY SPIRIT leading us into all truth REGARDING THE SCRIPTURES *AND* up-to-date inputs about our daily lives and God's will therein as well as fulfillment of Scriptural prophecies in our time.