<calendar name="americana">
  <month value="January"/>
  <month value="February"/>
  <month value="March"/>
  <month value="April"/>
  <month value="May"/>
  <month value="June"/>
  <month value="July"/>
  <month value="August"/>
  <month value="September"/>
  <month value="October"/>
  <month value="November"/>
  <month value="December"/>
</calendar>