In-law days: Daughter-in-Law, Mother-in-Law and Son-in-Law Day

Mother-in-Law Day falls on the fourth Sunday of October in the United States. Father-in-Law Day is listed on July 30. Daughter-in-Law Day and Son-in-Law Day have no date that everyone agrees on, so families tend to pick their own. None of these is a public holiday. They're small days that people mark with a message, a call or an afternoon together.

An example: Priya and her mother-in-law Ellen have always got on politely. They talk about the weather, the traffic and Ellen's garden, and not much else. A week before Mother-in-Law Day, Priya calls and asks for something odd as her present to Ellen: an afternoon in that garden, learning how to plant tulip bulbs properly. On the Sunday they kneel side by side at a freshly dug patch of soil. Ellen holds up a bulb and shows her the pointed end that goes up. Priya laughs, because she planted half of hers upside down at home the year before. Tom, Ellen's son, stands behind them with the basket, handing out bulbs and mostly keeping quiet. It's the longest the two women have ever talked.

In-law days at a glance

• Mother-in-Law Day: the fourth Sunday of October, first held in 1934.
• Father-in-Law Day: July 30, as calendar sites list it.
• Son-in-Law Day: April 10 was proposed in 1994 and never fixed.
• Daughter-in-Law Day: no agreed date. Calendar sites give several, often the third Saturday of August.
• Sister-in-law and brother-in-law: no day of their own.

Mother-in-Law Day, the one with a real date

The day goes back to Gene Howe, editor of the Amarillo Globe-News in Texas, who started it in 1934 after one of his columns upset his mother-in-law. In the 1970s florists settled on the fourth Sunday of October, and that's the date many calendars give now. A few list the last Sunday of October instead. The two only differ when October has five Sundays: in 2027 it falls on October 24, though calendars using the last Sunday put it on October 31.

It's an informal day, and nobody expects a big gesture. A call, a short message, or asking her advice on something she knows well is plenty. For many people the hardest part is sounding warm without sounding like a greeting card.

Daughter-in-Law Day: pick a date and keep it

This is the day with the least agreement. Some calendar sites list the third Saturday of August. Others give a date in late September or in July. No date has any official standing, so it doesn't matter much which one you choose.

The simplest fix is to choose a date that means something in your family, such as the day she joined it or the anniversary of the wedding, and keep it every year. A parent-in-law who remembers the same day each year sends a clearer message than any card.

If things with your daughter-in-law feel cool and you're not sure why, a message on her day won't fix it alone. Reading about why a daughter-in-law pulls back can help you see what's going on first.

Son-in-Law Day and the 1994 resolution

In 1994, a resolution in the US House of Representatives proposed April 10 as Son-in-Law Day. There's no sign it ever passed. As with daughters-in-law, many families choose their own date, or fold the day into his birthday or the wedding anniversary.

Father-in-Law Day, and the in-laws with no day

Calendar sites list Father-in-Law Day on July 30. It gets far less attention than Mother-in-Law Day, which some fathers-in-law find a relief.

Sisters-in-law and brothers-in-law have no widely listed day. If you want to mark one, a birthday is the natural moment, and a random "thought of you" message in the middle of the year lands even better.

What to do, depending on where you two stand

If you're new to the family

Keep it light. A short message on the day, signed with your name, shows you remembered. Ask one question about something they care about, and listen to the answer.

If you already get on well

Spend time together. Cook their favorite dish with them, help with a chore they've been putting off, or take a walk somewhere they like. Priya's afternoon in the garden is the kind of thing that sticks.

If things are polite but careful

Ask them to teach you something. People of any age like being the expert, and working side by side is easier than sitting face to face. Keep the visit short so it ends well.

If there's been friction

A brief, kind message is enough, and it doesn't commit you to anything. If the friction is about how much say each side has, the steps on boundaries with in-laws come first, and a day on the calendar can wait.

If you live far apart

Call instead of texting. A photo of something that reminds you of them, with one line, can mean more than a long letter.

Short messages for in-law days

For a mother-in-law:

• "Happy Mother-in-Law Day. Thank you for raising someone I love this much, and for making room for me."
• "I still use your trick for the gravy. Happy Mother-in-Law Day."

For the one who married your son or daughter:

• "We're so glad you're part of this family. Today seemed like a good day to say it."
• "You make our son happier than we've ever seen him. Thank you for that."

For a father-in-law:

• "Happy Father-in-Law Day. Thanks for every piece of advice, even the ones I pretended not to need."

For birthdays there's a separate set of birthday wishes for in-laws, sorted by who they're for. For the rest of the year, in-law quotes has lines that need no date at all.

Why one in-law loves the fuss and another shrugs

Typeza sees personality type as part of which. Eight of the 16 types:

• Ideator forgets the date but loves a surprise idea, like a new place to walk or a class to try together.
• Harmonizer would choose a slow meal at home, with comfort food and nobody in a hurry.
• Mentor remembers the day and likes the warm words to be said out loud.
• Commander would rather do something active together than read a card, like a long hike or an afternoon of heavy digging.
• Dreamer is quietly moved by a small, personal message and may not say so.
• Strategist would rather skip made-up days altogether, and still notices who remembered.
• Guardian values the in-law who keeps promises all year over any card on the day. A plain, honest word in person means the most.
• Craftsman likes a practical gesture, like fixing that squeaky gate together.

These are tendencies, and every family has its own habits too.

Find out what you and an in-law make together

Some in-laws feel easy from the first dinner, and others take years, and type is often part of why. Typeza shows two people the relationship type between them. Start with the free family compatibility test, then invite your mother-in-law, son-in-law or anyone in the family who is 16 or older.

Questions people ask

Is there a Daughter-in-Law Day?

Yes, though no one date is agreed. Calendar sites give several dates, often the third Saturday of August, so many families pick their own and keep it each year.

Is Mother-in-Law Day a real holiday?

It's a real observance with a long history, but it isn't a public holiday. Nothing closes for it, and marking it is up to you.

Sources

• 98.7 The Bomb, Celebrate an Amarillo made holiday, Mother-in-Law Day. Gene Howe of the Amarillo Globe-News, 1934, and the fourth Sunday of October set in the 1970s.
• GovInfo, H.J.Res 348, 103rd Congress, the 1994 House resolution naming April 10 National Son-in-Law Day, as introduced.

Written by Virko Kask, founder of Typeza
Written with the help of AI tools.