This is Supposed to be For the year (1980) Published 1979 - as you can see the 1981 book is also listed here and as a duplicate in my database. I am Not sure how to separate them. Also I have the entire series but I don't have access to them at this time (they are at my other home in Hawaii) for the correct ISBN Numbers:
I also did not list the series order. the entire series :(published from 1975-1981, so that 82 was the last)So the publication year is always the year before the diary was released i.e. 1980 diary published in 1979. 
Proposed series List: 1976, 1 and First in the Series... and 1982, 7 and Last in the Series
See: http://www.librarything.com/work/8255... for 1981 versionSee:http://www.librarything.com/work/1241... for the 1978 Version
Any of the versions listed are either under the Author Khigh Alx Dhiegh (otherwise under Khigh Dhiegh) Title on ALL versions I have is "I ching: Taoist book of days : calendar-diary" some entries in this data base include the Gregorian year (I ching: Taoist book of days : calendar-diary 1981. and other include the Gregorian Year and the Chinese Year (I ching: Taoist book of days : calendar-diary, 1978/4677) But the covers of the titles themselves do not have the year listed. Though the author Khigh Alx Dhiegh is listed inside (but not on the cover) He is combined with ( Khigh Dhiegh) and rightly so as he used that name as well in some of his other writings,  but not the Diary Series.