I reproduced the issue with python-apt 1.0.1ubuntu0.1 in Wily, and can confirm that the proposed version 1.0.1ubuntu0.1 solves the issue.
$ ubuntu-support-status Support status summary of 'wily-amd64': You have 2237 packages (85.3%) supported until July 2016 (9m) You have 4 packages (0.2%) supported until August 2016 (9m) You have 107 packages (4.1%) that can not/no-longer be downloaded You have 276 packages (10.5%) that are unsupported Run with --show-unsupported, --show-supported or --show-all to see more details $ apt list python3-apt -a Listing... Done python3-apt/wily-proposed,now 1.0.1ubuntu0.1 amd64 [installed] python3-apt/wily 1.0.1build1 amd64 ** Tags removed: verification-needed-wily ** Tags added: verification-done-wily -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to python-apt in Ubuntu. https://bugs.launchpad.net/bugs/1503979 Title: ubuntu-support-status throws exeption No date tag found (regression) Status in python-apt package in Ubuntu: Triaged Status in python-apt source package in Trusty: Fix Committed Status in python-apt source package in Wily: Fix Committed Bug description: Test Case --------- 1) Run ubuntu-support-status and observe a crash 2) Install python3-apt from the -proposed repository 3) Run ubuntu-support-status and see your status Description: Ubuntu 14.04.3 LTS Release: 14.04 update-manager-core: 1:0.196.14 Since the last update ubuntu-support-status throws Traceback (most recent call last): File "/usr/bin/ubuntu-support-status", line 133, in <module> pkg.name, support_tag) File "/usr/bin/ubuntu-support-status", line 49, in get_maintenance_status raise Exception("No date tag found") Exception: No date tag found To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/1503979/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp