Berean Standard Bible (BSB)
So the four angels who had been prepared for this hour and day and month and year were released to kill a third of mankind.
World English Bible (WEB)
The four angels were freed who had been prepared for that hour and day and month and year, so that they might kill one third of mankind.
Strong's King James
And{G2532} the four{G5064} angels{G32} were loosed{G3089}{(G5681)}, which{G3588} were prepared{G2090}{(G5772)} for{G1519} an hour{G5610}, and{G2532} a day{G2250}, and{G2532} a month{G3376}, and{G2532} a year{G1763}, for to{G2443} slay{G615}{(G5725)} the third part{G5154} of men{G444}.
The F.O.G *
(15) The four angels prepared for this hour, day, month and year were released in order to kill a third of mankind.
The F.O.G Message *
Young's Literal Translation
and loosed were the four messengers, who have been made ready for the hour, and day, and month, and year, that they may kill the third of men;