If you have questions about how to cite the date of a publication following the APA guidelines (6th ed.), please consult the examples below.
Year of Publication
The default option is to give the year of publication.
Crabby, M., & Grumby, Z. (Eds.). (2011). The Anxiety of Influence: Why the Fear of Plagiarism Haunts Academics [Special Issue]. Journal of Insipidity, 24(1).
Note the final period after the parentheses.
Month and Day
For popular publications such as magazines and newspapers, you can give the year, month, and day (if known):
Slinky, B. (2014, May 7). The Elephant in the Room, or How to Tranquilize an Unusually Obese Man. Popular Anesthetist, 108(4), 33-35.
For presentations and posters presented at conferences, provide just the year and month.
Adhocracy. (n.d.). In Dictionary of economic jargon (6th ed.). Retrieved from https://www.doej.com/business/adhocracy/
Prenderwick, E. [ca. 1972]. Peruvian Pavlovians Society constitution [Draft]. Papers of the Peruvian Pavlovians Society (CB1550). University of Lima, Lima, Peru.
Multi-volume publications are often published over a longer time period. Provide the first and last date of publication:
Sharp, B. (Ed.). (1999-2009). Famous Freudian slips: The complete anals (Vols. 1-11). Lima, Peru: Parapraxis Press.
If an article is accepted for publication but has not been officially published, write in press:
Blunt, R., Bumbles, T. T., & Wink, M. S. (in press). Can emojis adequately capture the emotional states of adolescents? Digital Communication Trends. Retrieved from https://www.academianut.org/384/25/emojis.pdf
For more information about citing the date of publication, please see p. 185 of the Publication Manual of the American Psychological Association (6th ed.).