[Android Themes] Yoanf_26:
Good.

For calendar icon with dynamic icons :

In appfilter.xml, you add after your scale factor

<calendar component="ComponentInfo{com.underwood.calendar_beta/com.android.calendar.AllInOneActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.underwood.calendar/com.android.calendar.AllInOneActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.digibites.calendar/com.digibites.calendar.WeekAgendaActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{net.daum.android.solcalendar/net.daum.android.solcalendar.CalendarActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{am.sunrise.android.calendar/am.sunrise.android.calendar.ui.HomeActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.google.android.calendar/com.android.calendar.LaunchActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.google.android.calendar/com.android.calendar.AllInOneActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.android.calendar/com.android.calendar.AllInOneActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.android.calendar/com.android.calendar.CalendarTabActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.android.calendar/com.android.calendar.LaunchActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.htc.calendar/com.htc.calendar.CalendarActivityMain}" prefix="calendar_" />
<calendar component="ComponentInfo{com.htc.calendar/com.htc.calendar.LaunchActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.lgl.calendar/com.lgl.calendar.activity.TabManagerActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.motorola.calendar/com.motorola.calendar.LaunchActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.motorola.calendar/com.android.calendar.AllInOneActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.sec.android.app.latin.launcher.calendar/com.sec.android.app.latin.launcher.calendar.Launcher}" prefix="calendar_" />
<calendar component="ComponentInfo{com.sonyericsson.calendar/com.sonyericsson.calendar.monthview.MonthViewActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.sonymobile.calendar/com.sonymobile.calendar.LaunchActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.htc.calendar/com.htc.calendar.CalendarCarouselActivity}" prefix="calendar_" />
<calendar component="ComponentInfo{com.asus.calendar/com.android.calendar.AllInOneActivity}" prefix="calendar_" />
<calendar component=":CALENDAR" prefix="calendar_" />

In iconpack.xml, you add :

<item>calendar_01</item>
<item>calendar_02</item>
<item>calendar_03</item>
<item>calendar_04</item>
<item>calendar_05</item>
<item>calendar_06</item>
<item>calendar_07</item>
<item>calendar_08</item>
<item>calendar_09</item>
<item>calendar_1</item>
<item>calendar_10</item>
<item>calendar_11</item>
<item>calendar_12</item>
<item>calendar_13</item>
<item>calendar_14</item>
<item>calendar_15</item>
<item>calendar_16</item>
<item>calendar_17</item>
<item>calendar_18</item>
<item>calendar_19</item>
<item>calendar_2</item>
<item>calendar_20</item>
<item>calendar_21</item>
<item>calendar_22</item>
<item>calendar_23</item>
<item>calendar_24</item>
<item>calendar_25</item>
<item>calendar_26</item>
<item>calendar_27</item>
<item>calendar_28</item>
<item>calendar_29</item>
<item>calendar_3</item>
<item>calendar_30</item>
<item>calendar_31</item>
<item>calendar_4</item>
<item>calendar_5</item>
<item>calendar_6</item>
<item>calendar_7</item>
<item>calendar_8</item>
<item>calendar_9</item>

And in drawable.xml

<item drawable="calendar_01" />
<item drawable="calendar_02" />
<item drawable="calendar_03" />
<item drawable="calendar_04" />
<item drawable="calendar_05" />
<item drawable="calendar_06" />
<item drawable="calendar_07" />
<item drawable="calendar_08" />
<item drawable="calendar_09" />
<item drawable="calendar_1" />
<item drawable="calendar_2" />
<item drawable="calendar_3" />
<item drawable="calendar_4" />
<item drawable="calendar_5" />
<item drawable="calendar_6" />
<item drawable="calendar_7" />
<item drawable="calendar_8" />
<item drawable="calendar_9" />
<item drawable="calendar_10" />
<item drawable="calendar_11" />
<item drawable="calendar_12" />
<item drawable="calendar_13" />
<item drawable="calendar_14" />
<item drawable="calendar_15" />
<item drawable="calendar_16" />
<item drawable="calendar_17" />
<item drawable="calendar_18" />
<item drawable="calendar_19" />
<item drawable="calendar_20" />
<item drawable="calendar_21" />
<item drawable="calendar_22" />
<item drawable="calendar_23" />
<item drawable="calendar_24" />
<item drawable="calendar_25" />
<item drawable="calendar_26" />
<item drawable="calendar_27" />
<item drawable="calendar_28" />
<item drawable="calendar_29" />
<item drawable="calendar_30" />
<item drawable="calendar_31" />

And you add your icons calendar. One icon for one day. And name's icons you must have :

For day 1 = calendar_01 and calendar_1

For day 2 = calendar_02 and calendar_2

For day 3 = calendar_03 and calendar_3

For day 4 = calendar_04 and calendar_4

For day 5 = calendar_05 and calendar_5

For day 6 = calendar_06 and calendar_6

For day 7 = calendar_07 and calendar_7

For day 8 = calendar_08 and calendar_8

For day 9 = calendar_09 and calendar_9

For day 10 = calendar_10

For day 11 = calendar_11

For day 12 = calendar_12

For day 13 = calendar_13

For day 14 = calendar_14

For day 15 = calendar_15

For day 16 = calendar_16

For day 17 = calendar_17

For day 18 = calendar_18

For day 19 = calendar_19

For day 20 = calendar_20

For day 21 = calendar_21

For day 22 = calendar_22

For day 23 = calendar_23

For day 24 = calendar_24

For day 25 = calendar_25

For day 26 = calendar_26

For day 27 = calendar_27

For day 28 = calendar_28

For day 29 = calendar_29

For day 30 = calendar_30

For day 31 = calendar_31

For iconback, I haven't use it.