Everything - More particularly, the actions of people (e. g. his own, Ecclesiastes 2:1-8) and events which happen to people, the world of Providence rather than the world of creation. It would seem that most of his own works described in Ecclesiastes 2:1-8 were present to his mind. The rare word translated "season" means emphatically "fitting time" (compare Nehemiah 2:6; Esther 9:27, Esther 9:31).

To every thing there is a season, and a time to every purpose - Two general remarks may be made on the first eight verses of this chapter.
1. God by his providence governs the world, and has determined particular things and operations to particular times. In those times such things may be done with propriety and success; but if we neglect the appointed seasons, we sin against this providence, and become the authors of our own distresses.
2. God has given to man that portion of duration called Time; the space in which all the operations of nature, of animals, and intellectual beings, are carried on; but while nature is steady in its course, and animals faithful to their instincts, man devotes it to a great variety of purposes; but very frequently to that for which God never made time, space, or opportunity. And all we can say, when an evil deed is done, is, there was a time in which it was done, though God never made it for that purpose.
To say any farther on this subject is needless, as the words themselves give in general their own meaning. The Jews, it is true, see in these times and seasons all the events of their own nation, from the birth of Abraham to the present times; and as to fathers and their followers, they see all the events and states of the Christian Church in them!
It is worthy of remark, that in all this list there are but two things which may be said to be done generally by the disposal of God, and in which men can have but little influence: the time of birth, and the time of death. But all the others are left to the option of man, though God continues to overrule them by his providence. The following paraphrase will explain all that is necessary to be generally understood: -

To every [thing there is] a (a) season, and a time to every purpose under the heaven:
(a) He speaks of this diversity of time for two causes first to declare that there is nothing in this world perpetual: next to teach us not to be grieved, if we have not all things at once according to our desires, neither enjoy them so long as we would wish.

To every thing there is a season,.... A set determined time, when everything shall come into being, how long it shall continue, and in what circumstances; all things that have been, are, or shall be, were foreordained by God, and he has determined the times before appointed for their being, duration, and end; which times and seasons he has in his own power: there was a determined time for the whole universe, and for all persons and things in it; a settled fixed moment for the world to come into being; for it did not exist from everlasting, nor of itself, nor was formed by the fortuitous concourse of atoms, but by the wisdom and power of God; nor could it exist sooner or later than it did; it appeared when it was the will of God it should; in the beginning he created it, and he has fixed the time of its duration and end; for it shall not continue always, but have an end, which when it will be, he only knows: so there is a determined time for the rise, height, and declension of states and kingdoms in it; as of lesser ones, so of the four great monarchies; and for all the distinct periods and ages of the world; and for each of the seasons of the year throughout all ages; for the state of the church in it, whether in suffering or flourishing circumstances; for the treading down of the holy city; for the prophesying, slaying, and rising of the witnesses; for the reign and ruin of antichrist; for the reign of Christ on earth, and for his second coming to judgment, though of that day and hour knows no man: and as there is a set time in the counsels and providence of God for these more important events, so for every thing of a lesser nature;
and a time to every purpose under the heaven; to every purpose of man that is carried into execution; for some are not, they are superseded by the counsel of God; some obstruction or another is thrown in the way of them, so that they cannot take place; God withdraws men from them by affliction or death, when their purposes are broken; or by some other way; and what are executed he appoints a time for them, and overrules them to answer some ends of his own; for things the most contingent, free, and voluntary, fall under the direction and providence of God. And there is a time for every purpose of his own; all things done in the world are according to his purposes, which are within himself wisely formed, and are eternal and unfrustrable; and there is a time fixed for the execution of them, for every purpose respecting all natural and civil things in providence; and for every purpose of his grace, relating to the redemption of his people, the effectual calling of them, and the bringing them to eternal glory; which are the things that God wills, that he takes delight and pleasure in, as the word (e) signifies. The Septuagint and Vulgate Latin versions render it, "to everything under the heaven there is a time"; and Jarchi observes that in the Misnic language the word used so signifies. The Targum is,
"to every man a time shall come, and a season to every business under heaven.''
(e) "omni voluntati", Montanus, Mercerus, Cocceius; i.e. "rei proprie capitae ac desideratae", Drusius.

To expect unchanging happiness in a changing world, must end in disappointment. To bring ourselves to our state in life, is our duty and wisdom in this world. God's whole plan for the government of the world will be found altogether wise, just, and good. Then let us seize the favourable opportunity for every good purpose and work. The time to die is fast approaching. Thus labour and sorrow fill the world. This is given us, that we may always have something to do; none were sent into the world to be idle.

(Ecclesiastes. 3:1-22)
Man has his appointed cycle of seasons and vicissitudes, as the sun, wind, and water (Ecclesiastes 1:5-7).
purpose--as there is a fixed "season" in God's "purposes" (for example, He has fixed the "time" when man is "to be born," and "to die," Ecclesiastes 3:2), so there is a lawful "time" for man to carry out his "purposes" and inclinations. God does not condemn, but approves of, the use of earthly blessings (Ecclesiastes 3:12); it is the abuse that He condemns, the making them the chief end (1-Corinthians 7:31). The earth, without human desires, love, taste, joy, sorrow, would be a dreary waste, without water; but, on the other hand, the misplacing and excess of them, as of a flood, need control. Reason and revelation are given to control them.

"Everything has its time, and every purpose under the heavens its hour." The Germ. language is poor in synonyms of time. Zckler translates: Everything has its Frist, but by Frist we think only of a fixed term of duration, not of a period of beginning, which, though not exclusively, is yet here primarily meant; we have therefore adopted Luther's excellent translation. Certainly זמן (from זמן, cogn. סמן, signare), belonging to the more modern Hebrews., means a Frist (e.g., Daniel 2:16) as well as a Zeitpunkt, point of time; in the Semit. (also Assyr. simmu, simanu, with ס) it is the most common designation of the idea of time. עת is abbreviated either from ענת (ועד, to determine) or from ענת (from ענה, cogn. אנה, to go towards, to meet). In the first case it stands connected with מועד on the one side, and with עדּן (from עדד, to count) on the other; in the latter case, with עונה, Exodus 21:10 (perhaps also ען and ענת in כען, כּענת). It is difficult to decide this point; proportionally more, however, can be said for the original ענת (Palest.-Aram. ענתּא), as also the prep. of participation את is derived from אנת (meeting, coming together).
(Note: Vid., Orelli's work on the Hebrews. Synon. der Zeit u. Ewigkeit, 1871. He decides for the derivation from ועד morf ; Fleischer (Levy's Chald. W.B. II. 572) for the derivation from ענה, the higher power of אנה, whence (Arab.) inan, right time. We have, under Job 24:1, maintained the former derivation.)
The author means to say, if we have regard to the root signification of the second conception of time - (1) that everything has its fore-determined time, in which there lies both a determined point of time when it happens, and a determined period of time during which it shall continue; and (2) that every matter has a time appointed for it, or one appropriate, suitable for it. The Greeks were guided by the right feeling when they rendered זמן by χρόνος , and עת by καιρός.
Olympiodorus distinguishes too sharply when he understands the former of duration of time, and the latter of a point of time; while the state of the matter is this, that by χρόνος the idea comprehends the termini a quo and ad quem, while by καιρός it is limited to the terminus a quo. Regarding חפץ, which proceeds from the ground-idea of being inclined to, and intention, and thus, like πρᾶγμα and χρῆμα, to the general signification of design, undertaking, res gesta, res.
The illustration commences with the beginning and the ending of the life of man and (in near-lying connection of thought) of plants.

A season - A certain time appointed by God for its being and continuance, which no human wit or providence can alter. And by virtue of this appointment of God, all vicissitudes which happen in the world, whether comforts or calamities, come to pass. Which is here added to prove the principal proposition, That all things below are vain, and happiness is not to be found in them, because of their great uncertainty, and mutability, and transitoriness, and because they are so much out of the reach and power of men, and wholly in the disposal of God. Purpose - Not only natural, but even the voluntary actions of men, are ordered and disposed by God. But it must be considered, that he does not here speak of a time allowed by God, wherein all the following things may lawfully be done, but only of a time fixed by God, in which they are actually done.