Epic dates not able to be saved

Summary

When creating epics unable to save a start or due date. Receive a "An error occurred while saving the start date" or "An error occurred while saving the due date" when trying to do so

Steps to reproduce

  1. Create a new epic at the project level.
  2. Once epic is created try to adjust start or end date to be a fixed date
  3. Observe error message and inability to save down date

What is the current bug behavior?

  1. See steps to reproduce/summary

What is the expected correct behavior?

  • Should be able to save start and due date for epic

Relevant logs and/or screenshots

  1. image
  2. Enter in a start or due date
  3. Observe error: image

Output of checks

This bug happens on GitLab.com

Results of GitLab environment info

Expand for output related to GitLab environment info 
(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:env:info)


(For installations from source run and paste the output of:
sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production)

Results of GitLab application Check

Expand for output related to the GitLab application check 
(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:check SANITIZE=true)


(For installations from source run and paste the output of:
sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)


(we will only investigate if the tests are passing)

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)