CCSM_DRIVER SHR_CAL_YMD2DATE SHR_CAL_YMD2DATE SHR_CAL_NUMDAYSINMONTH SHR_CAL_NUMDAYSINMONTH SHR_CAL_NUMDAYSINMONTH SHR_CAL_ELAPSDAYSSTRTMONTH SHR_CAL_ELAPSDAYSSTRTMONTH SHR_CAL_ELAPSDAYSSTRTMONTH SHR_CAL_ELAPSDAYSSTRTMONTH