Some 16,000 people have registered for the event, most of whom are from overseas, Martin said.
And as the date gets closer, organizers on the ground are starting to "ratchet up" the preparations at a faster pace.
"This is an opportunity for families to meet families from other parts of the world and to learn from each other and to share with one another how we do it; how do we actually survive as a family in this crazy, complicated world," Martin said.
Excitement is building and Ireland is ready to give the pope and the world "a hundred thousands of welcomes," he said, using a colloquial Irish saying.
Martin said the gathering will be a time for families to come together and share their experiences, their hopes, and their challenges, without sugar-coating anything.
Acknowledging that no family is perfect, "we're not in any way trying to romanticize family love," he said. Rather, the goal is to share the Christian vision of the family, based on hope and love, and to welcome families who are distant or who perhaps don't feel welcome, he said.
"The word 'welcome' is important," he said, adding that for him, it is sad to hear when people say that for whatever reason, they do not feel entirely welcome in the Church.
And this goes not only for "these neuralgic issues, for example LGBT people or people living in second unions … I'm talking about people who think the Church's vision of the family is completely out of touch with reality," Martin said.
"I would love to think that we can talk about ways of welcoming families, welcoming people who … feel that they don't measure up, or feel that unless their family is perfect, that everyone in their family is living a perfectly holy life, that they are not welcome," he said.
To this end, he pointed to Gaudete et exsultate, Pope Francis' exhortation on the call to holiness in today's world, saying example of holiness can be found in "your mom, your grandmother, your dad. People who struggled but lived as best they could a faithful life."
"So I think that when we think about reaching out, sometimes we think they are people way out on the margins, but often they are people who are simply trying to struggle to live a good family life everyday and who feel that somehow the Church presents an impossible ideal."
(Story continues below)
Subscribe to our daily newsletter