According to Ron Weinland, when God screwed up his timing in 2008 and 2012, he changed the meaning of the word "day" to not 24 hour period of time, but a 50-day long period. Ordinary days became "prophetic" days.
It is always fun to watch Church of God false prophets back peddle after their "sure word" predictions fail, as they have consistently done for over 80 some years now. That has never stopped our current crop of prophets.
Today, COG prophets just spin their failures into "God has delayed his timing" or some other silly excuses.
Take Ron Weinland's recent failures as an example:
As mentioned, the “prophetic day” God had determined for 2012 as being the first possible date for Christ’s coming was the literal one-day period that would have been on Pentecost of that year.
For all of the reasons being stated in this chapter, God judged that seven additional years be granted to mankind before the final stages of the end-time should commence, and that Pentecost of 2019 would be the next date set for Christ’s return to this earth. It will be on that day that he will once again stand upon the Mount of Olives as scripture foretells. In making this change, God has also made a change in the duration for which that last “prophetic day” is to be fulfilled. Instead of that period being defined as a literal one-day period as it was before 2012, God is now defining that “prophetic day” as 50 actual days.
On the day that Jesus Christ begins his return to this earth, he will become manifest above the atmosphere of this earth, and after this, God will then begin a process of pouring out those plagues. Rather than pouring all of them out in a single day, God will now do so throughout the period of 50 literal days. Yet just before these plagues begin to be poured out, the 144,000 will be resurrected.