https://almascience.nao.ac.jp/news/alma-cycle-5-pre-announcement

ALMA Cycle 5 Pre-announcement
Dec 16, 2016
The Joint ALMA Observatory (JAO) will start the next cycle of observing (Cycle 5) in October 2017. A Call for Proposals with detailed information on Cycle 5 will be issued in March 2017, with a deadline for proposal submission in April 2017. This pre-announcement highlights aspects of the Cycle 5 proposal call that are needed to plan proposals.

General information
ALMA Cycle 5 will start in early October 2017 and span 12 months. 
is anticipated that 4000 hours of 12-m Array time will be available for
successful observations of approved projects, and 3000 hours will be
available on the Atacama Compact Array (ACA), also known as the Morita
Array.

New in Cycle 5
In Cycle 5, the following opportunities will be available to Proposers for the first time.
-Band 4 polarization: Proposals will be accepted for Band 4 observations
in all available polarization modes.
- Band 5 observations: Proposals will be accepted for spectral line
(12-m,7-m and Total Power arrays) and continuum (12-m and 7-m arrays)
observations in Band 5. Proposals will be accepted for Band 5
observations in all available polarization modes. 

on behalf of EA ARC
-- 
K. Tatematsu (National Astronomical Observatory of Japan)