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(important) milestone in (one's) life

An exceptionally momentous, significant, or impactful moment, situation, or event in one's life. There is no milestone in your life that will ever compare with the birth of your child. I knew even then that that conversation would prove to an important milestone in my life.
See also: life, milestone
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

milestone in someone's life

 and important milestone in someone's life
a very important event or point in one's life. (From the [former] stone markers at the side of a road showing the distance to or from a place.) Joan's wedding was a milestone in her mother's life. The birth of a child is a milestone in every parent's life.
See also: life, milestone
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
In addition, DC serves as Milestone's media and product licensing agent, pitching characters to potential manufacturers.
By having clear technical milestones, a project manager in a food-processing company was able to appreciate the impact of a delay in getting supplemental test equipment.
Prior to each meeting, each team member submits their updates and the designated person or milestone process manager compiles and circulates updated milestone tracking in advance of the meeting.
'It is a good thing that the RCB has preserved the milestone in its area in its original form,' he said.
Milestones are important, of course, but there's no need to be checking off the things your child should be doing and when.
Under the terms of the agreement, Incyte has exclusive rights to fund and conduct global development and commercialisation of four disclosed antibody candidates, LAG-3, TIM-3, GITR and OX40 and one undisclosed candidate, under which, Agenus is eligible to receive milestone and royalty payments.
Following the above milestone payment of EUR4m, Saniona will have received a total of EUR9m under the collaboration.
or rapid upgrade to one of the more advanced editions through a Milestone
Milestone College cadets participated in the cultural activities, sports, band and parade competitions in camps and achieved tremendous success.
Milestone Properties will promote multi-use real estate projects in the European side of Istanbul near the New Airport and Kanal Istanbul which are currently the main infrastructure projects in Istanbul.
Former international footballer, Louis Saha has agreed to increase his company's relationship with Milestone Group by signing a joint venture between his Axis Stars Co and Milestone Group.
The Historical Society of Michigan's Milestone Award program recognizes businesses, organizations, and governmental institutions that have reached their 50th, 100th, or 150th anniversaries.
Copenhagen, Denmark, June 03, 2015 --( Milestone Systems, the open platform company in IP video management software (VMS) is today highlighting the initiative lead by Last Mile Communication.
Milestone Systems said it has announced Benjamin Low as the new VP Sales, APAC.
Auto Business News-December 5, 2014--Maserati achieves milestone of producing 50,000 cars at Giovanni Agnelli Plant