Parts of Barry will be lit up in pink and blue to mark Baby Loss Awareness Week.
The event, running from 9th to 15th October, aims to unite bereaved parents, family and friends with others and commemorate their babies' lives.
It's also an opportunity to fundraise for vital research into miscarriage, stillbirth and premature birth.
Locally, the western and eastern shelters on Barry Island will be illuminated, along with the Hood Road Tunnel.
Vale of Glamorgan Council say they hope it will help start more conversations about baby loss.
Councillor Ben Gray, cabinet member for social care and health, said: ''It is estimated that one in four pregnancies in the UK end in loss during pregnancy or birth. This is a tragedy that affects thousands of people every year but is not widely known.''
''Supporting causes like Baby Loss Awareness Week is vitally important to provide bereaved parents and families with an opportunity to talk about their experience and fundraise for the charities that have supported them.''
More than 100 charities, led by SANDS - the Stillbirth and Neonatal Death Charity - have formed the Baby Loss Awareness Alliance.
They work together to break the taboo and improve policy, bereavement care and support for anyone affected by the death of a baby.
Organisers are encouraging those who'd like to take part to join a memorial 'Wave of Light' by lighting a candle for one hour at 7pm next Friday (15th October)
A series of live online discussions will also be held throughout the week on the SANDS website.