There is normally trading in options that have different lengths of time remaining until expiration - from less than a month to twelve or more months. The choice is yours. This flexibility makes it possible to select whichever option best coincides with when you expect a given price movement to occur.

Example: Buying an option that expires in October allows three more months for the expected price change to take place than buying an option that expires in July.

Purchasing a longer option increases the premium cost of the option somewhat (see question 12) but, as with most things in life, it's usually best to allow at least a little extra time for an expected event to occur!  Don't hesitate to seek your broker's assistance in deciding how long an option it would be advisable to consider purchasing.