tt-rss/lib/dijit/themes/claro/Calendar_rtl.css

.claro .dijitCalendarRtl .dijitCalendarIncrease {
  background-position: 0 0;
}
.claro .dijitCalendarRtl .dijitCalendarDecrease {
  background-position: -18px 0;
}
.claro .dijitCalendarRtl .dijitCalendarArrowHover .dijitCalendarIncrease {
  background-position: -36px 0;
}
.claro .dijitCalendarRtl .dijitCalendarArrowHover .dijitCalendarDecrease {
  background-position: -55px 0;
}
.claro .dijitCalendarRtl .dijitCalendarArrowActive .dijitCalendarIncrease {
  background-position: -72px 0;
}
.claro .dijitCalendarRtl .dijitCalendarArrowActive .dijitCalendarDecrease {
  background-position: -91px 0;
}