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To better associate the heads with their respective calendars, let’s remove the margin below them:

h2 {
	text-align: center;
	font-family: Georgia;
	font-weight: normal;
	margin: 1em 0 0 0;
	}
…

Written in this shortened form, margin values can be described in this order:

margin: top right bottom left;

This shorthand works similarly for padding, border-width and other relevant properties.

April 2007

Su Mo Tu We Th Fr Sa
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30

May 2007

Su Mo Tu We Th Fr Sa
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31