With accent marks:
Всему́ своё вре́мя.
Everything has its time.
The proverb got into everyday language from books. Perhaps, for the first time it was used in the Bible.
Ecclesiastes says that there is a time to scatter stones and a time to gather them. It should be understood that every event takes place on its own time. For example, a child can be born only after nine months, potatoes will grow only by autumn, and snow will fall in winter...
Sometimes this proverb is used as an invitation to wait, not to rush.
Other Russian proverbs
Don't bring your set of rules in a foreign monastery
Poor people are inventive.
One in the field is not a warrior.
If you like sledding, you should like to carry the sled.
Get your sleigh ready in summer and your (horse-drawn) cart in winter.
We got what we fought for.
Strike the iron while it's hot.
Live for a century, learn for a century, but die being a fool anyway.