YM Biosciences 6-K YM BioSciences Announces Record Date for Previously Announced Plan of Arrangement

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16

OF THE SECURITIES EXCHANGE ACT OF 1934

For the month of December 2012

Commission File Number: 1-32186

YM BIOSCIENCES INC.

(Translation of registrant's name into English)

Suite 400, Building 11

5045 Orbiter Drive

Mississauga, Ontario

Canada L4W 4Y4

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F o Form 40-Fx

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1)  o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7)  o

DOCUMENTS FILED

See the Exhibit Index hereto.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

YM BIOSCIENCES INC.
By:	/s/ Leonard Vernon
	Leonard Vernon Vice President, Finance and Administration

Date: December 21, 2012

EXHIBIT INDEX

Exhibit	Description
99.1	News Release Dated December 21, 2012 - YM BioSciences Announces Record Date for Previously Announced Plan of Arrangement