On the evening of September 12, Southlake Town Hall will light up. Not with the usual porch-light glow of a city building after hours, but with a full light show projected across its face, the finale to this year's Celebrate Southlake block party in Southlake Town Square. It will run for a few minutes, draw a crowd, and then it will be over. The lights will go dark, the food trucks will pack up, and the block party will become last year's block party.
That's the part of Southlake's 70th anniversary everyone will see. It's also the smallest part of it.
The city incorporated in 1956, which makes 2026 its 70th year, and Southlake has structured that milestone into three separate checkpoints spread across twelve months rather than one ceremonial afternoon. One checkpoint already happened. One has been running quietly since earlier this year and doesn't have an end date. One is five weeks away. If you only track the loudest of the three, you'll miss the one that actually outlasts the year.
Three Checkpoints, Not One Anniversary
Here's how the year has been built:
- July 3 — Stars & Stripes, the city's annual Independence Day celebration, doubled as a joint tribute to America's 250th birthday and Southlake's 70th, closing with a 9:30 p.m. fireworks display. This one's already in the past.
- Ongoing since early 2026 — the 2,026 Trees in 2026 initiative, a citywide effort to plant 2,026 trees before the year ends, tracked on a public map and open to anyone with a yard.
- September 12 — Celebrate Southlake, the city's long-running annual birthday party, held this year at Southlake Town Square from 4 to 9 p.m. with a 70th-anniversary light show and free tree saplings added to the usual lineup.
Most cities mark a milestone birthday with a single event and call it done. Southlake spread its 70th across the whole calendar and made the middle piece the one that doesn't require you to show up on a specific day at all.
The Fireworks Already Happened
If you were at Town Square on July 3, you already saw the first checkpoint close out. The evening combined the semiquincentennial of the country with the city's own 70th, and organizers encouraged guests to stick around for the 9:30 p.m. fireworks. It was a one-night event with a clear start and finish, the kind of anniversary marker most residents expect and most cities stop at.
Southlake didn't stop there, and the reason matters more than the fireworks did.
The Part That's Been Running Since February
Back in February, Mayor Shawn McCaskill visited Liberty Gardens inside Bicentennial Park to preview the planting of a new Shumard Oak, a tree donated by the Daughters of the American Revolution as part of the city's 2,026 Trees in 2026 program. That single tree is one entry in a much larger tally the city is keeping on a public map, tracking progress toward planting 2,026 trees across parks, public spaces, city improvement projects, and private yards before the year is out.
This is the part of the anniversary that doesn't have a ticket, a stage, or an end time. It runs on a different logic entirely: instead of asking residents to attend something, it asks them to plant something. The city's own guidance for anyone taking part is straightforward. Call 811 before digging so you don't hit a utility line, dig a wide hole at the proper depth, water regularly, and keep mulch a few inches clear of the trunk.
A resident who wants in has a few ways to do it:
- Plant a tree in your own yard and register it toward the citywide count.
- Show up to one of the organized planting events held throughout 2026 in parks and public spaces.
- Donate a tree or contribute funding through the initiative's page.
- Pick up a free sapling at a community event, while supplies last.
None of this shows up on a highlight reel the way a fireworks show or a light projection does. But a tree planted this year will be taller in 2036, still standing in 2046, and providing real shade over a Southlake yard decades after anyone remembers the exact date of the block party that gave it away. That's the actual difference between the three checkpoints. Two of them end when the crowd goes home. One of them starts small and keeps growing regardless of who's watching.
What's Left on the Calendar
The third checkpoint is Celebrate Southlake, and it's worth being specific about what makes this year's version different from the ones before it. The event itself isn't new. Southlake has held some form of Celebrate Southlake as its annual birthday bash for years, drawing crowds to Town Square with food trucks and live entertainment in past editions.
What's new for the 70th is layered on top of that familiar format. This year's Celebrate Southlake, set for Saturday, September 12, from 4 to 9 p.m. at Southlake Town Square, keeps the block party basics, live performances from local bands, food trucks, and free activity booths hosted by community organizations and businesses, and adds two things that weren't part of last year's version: a light show projected onto the Town Hall building to close out the evening, and free tree saplings tied directly to the 2,026 Trees in 2026 initiative, available while supplies last for anyone who wants to take one home and plant it.
That last detail is the connective tissue between the two halves of this anniversary. The party isn't separate from the tree program, it's the distribution point for it. Show up on September 12, and you can walk away with the same kind of sapling the city has been planting in parks all year, minus the wait and the shovel work already done for you.
The Gift That Keeps Growing After the Lights Go Off
By the time 2026 ends, Southlake will have thrown itself two visible parties for its 70th birthday. Both will be remembered the way most single-night events are remembered: fondly, briefly, and then replaced by whatever comes next on the calendar. The fireworks from July are already fading into "remember when." The light show on Town Hall this September will follow the same path eventually.
The trees won't. The Shumard Oak planted at Liberty Gardens will still be widening its canopy over Bicentennial Park long after most residents have forgotten the exact number 2,026 attached to it. That's not a coincidence, it's the design. Southlake built its milestone year around one loud night that already happened, one loud night that's coming, and one quiet effort in between that doesn't need either of them to keep working.
If you're at Town Square on September 12, watch the light show. It's worth seeing. But take the sapling home too. Seventy years from now, it'll have outlasted every other part of the celebration by decades.
Southlake keeps adding these small, specific layers to what it means to live here, and that's exactly the kind of texture we track closely at Move 2 DFW. If you're curious how a city's day-to-day character, not just its median price, should factor into where you plant your own roots in North Texas, we're always glad to talk it through.
