Public holiday 2017 is signed and publish for the public use recently. The sign date from Cambodia minister date on 27 October 2016. Total date of holidays is 26 days, (14 May fell into two events).
If you would like to get it as a reference, please see the below schedule.

 

01-Jan-2017	International New Year Day
07-Jan-2017	Victory over Genocide Day
11-Feb-2017	Meak Bochea Day
08-Mar-2017	International Women’s Day
14, 15, 16-Apr-2017	Khmer New Year Day
01-May-2017	International Labor Day
10-May-2017	Visak Bochea Day
13, 14, 15-May-2017	King’s Birthday, Norodom Sihamoni
14-May-2017	Royal Plowing Ceremony
01-Jun-2017	International Children Day
18-Jun-2017	King’s Mother Birthday, Norodom Monineath Sihanouk
19, 20, 21-Sep-2017	Pchum Ben Day
24-Sep-2017	Constitutional Day
15-Oct-2017	Commemoration Day of King’s Father, Norodom Sihanouk
23-Oct-2017	Paris Peace Agreements Day
29-Oct-2017	King’s Coronation Day, Norodom Sihamoni
02, 03, 04-Nov-2017	Water Festival Ceremony
09-Nov-2017	Independence Day
10-Dec-2017	International Human Rights Day

 

You can download public announcement of the government of Cambodia number 223 related to public holiday year 2017 in PDF format in Khmer Public Holiday 2017 – State Announcement
Or from the ministry of Ministry of Labour and Vocational Training

 

Also you can download a State Announcement Public Holiday 2017 English Un-Official Translate