done by giving names to periods of time, typically days, weeks, months, and years. The name given to each day is known as a date. Periods in a calendar (such as years and months) are usually, though not necessarily, synchronized with the cycle of the sun or the moon.</p>
                        <p class="theme">
                            <span class="other">Other</span>
                            <span class="group1">Group 1</span>
                        </p>
                        <p class="like">18 L