The phrase "auspicious date" refers to a specific day or time that is believed to be lucky or favorable for starting something important or significant. Full definition
Some 200 couples gathered at the temple to attend a grand colorful wedding ceremony on December 12, 2012, which many in Asia mark as an auspicious date on the calendar. (religion.blogs.cnn.com)
So maybe 30 November is an auspicious date for successful League Cup encounters as we prepare for episode two of the Old Trafford series on Wednesday. (westhamway.net)