<calendar>
<years>
<year days="4">
<year days="6">
<year days="1">
</years>
<months>
<month days="2">
<month days="4">
<month days="5">
</months>
<weeks>
<week days="1">
<week days="2">
<week days="2">
<week days="2">
<week days="2">
<week days="2">
</weeks>
</calendar>