Only appears when there is a leap year, such as in 2015/16.
Numbers 28:11-13 Tree of Life Version (TLV)
Rosh Chodesh: New Moon
11 “On the first of the month you are to present to Adonai a burnt offering of two young bulls, one ram, and seven flawless male lambs a year old, 12 with three tenths of an ephah of fine flour mixed with oil as a grain offering with each bull, and two tenths of an ephah of fine flour mixed with oil as a grain offering with the ram, 13 and with each lamb a tenth of an ephah of fine flour mixed with oil for a grain offering, a burnt offering as a pleasing aroma, an offering by fire to Adonai.
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