Connecting Passover and the Holiday of Shavuot is the period known as Sefira. We count the days of the Omer starting on the second day of Passover - our day of liberation from slavery. We continue counting for 49 days until the day on which we commemorate the receiving of the Torah - the culmination of our liberation.
What, we might ask, is the point of counting days, measuring time? Time just marches on. We can all march to the beat of a different drummer, but we can't actually change time, can we?
Quantitatively, time cannot be changed. Qualitatively though, time can be changed. That is the lesson of Sefira. Time is like a container. We can fill it with nothingness by wasting it away, or, we can fill it with meaningful activities.
In the days between Passover and Shavuot, we are preparing for the receiving of the Torah. During this preparation period, we should make sure to fill our time "container" with meaningful accomplishments.
In this way, we will actually be able to "stretch" time. By instilling our actions in the here and now with Jewish content, we fill our limited time with infinite eternal and timeless acts. We transfer and elevate our own time beyond and above time.
Every day when we count the Omer, we are reminded to fill our time with the mitzvot that need to be attended to on a particular day and not push them off for another time. We count each day as well as the weeks which are referred to as 'Sabbaths'. In doing so, we will play our part in hastening the Redemption and ushering in a time known as the ultimate Sabbatical—a period of universal utopia, peace, and tranquility!
