diff --git a/pyproject.toml b/pyproject.toml
index 0f1d8eda..7345eb57 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -96,7 +96,7 @@ dependencies = [
   "typer==0.26.8",
   "typing-extensions==4.16.0",
   "typing-inspection==0.4.2",
-  "tzdata==2025.3",
+  "tzdata==2026.3",
   "urllib3==2.7.0",
   "utm==0.8.1",
   "uvicorn==0.51.0",
diff --git a/requirements.txt b/requirements.txt
index 610eb652..329ae830 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1989,9 +1989,9 @@ typing-inspection==0.4.2 \
     #   fastapi
     #   ocotilloapi
     #   pydantic
-tzdata==2025.3 \
-    --hash=sha256:06a47e5700f3081aab02b2e513160914ff0694bce9947d6b76ebd6bf57cfc5d1 \
-    --hash=sha256:de39c2ca5dc7b0344f2eba86f49d614019d29f060fc4ebc8a417896a620b56a7
+tzdata==2026.3 \
+    --hash=sha256:4a1518b8993086a7982523e071643f3c0e5f213e75b21318e78bcabfff9d1415 \
+    --hash=sha256:dc096730c87af6cab1b171c9d532be840741ff5d459015e7f6947bd7d7e54931
     # via
     #   ocotilloapi
     #   pandas
diff --git a/uv.lock b/uv.lock
index af5d1984..931ad8ee 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1708,7 +1708,7 @@ requires-dist = [
     { name = "typer", specifier = "==0.26.8" },
     { name = "typing-extensions", specifier = "==4.16.0" },
     { name = "typing-inspection", specifier = "==0.4.2" },
-    { name = "tzdata", specifier = "==2025.3" },
+    { name = "tzdata", specifier = "==2026.3" },
     { name = "urllib3", specifier = "==2.7.0" },
     { name = "utm", specifier = "==0.8.1" },
     { name = "uvicorn", specifier = "==0.51.0" },
@@ -3038,11 +3038,11 @@ wheels = [
 
 [[package]]
 name = "tzdata"
-version = "2025.3"
+version = "2026.3"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/5e/a7/c202b344c5ca7daf398f3b8a477eeb205cf3b6f32e7ec3a6bac0629ca975/tzdata-2025.3.tar.gz", hash = "sha256:de39c2ca5dc7b0344f2eba86f49d614019d29f060fc4ebc8a417896a620b56a7", size = 196772, upload-time = "2025-12-13T17:45:35.667Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/92/ff/5a28bdfd8c3ebec42564ac7d0e54ca3db65044a9314a97f9564fa7a1e926/tzdata-2026.3.tar.gz", hash = "sha256:4a1518b8993086a7982523e071643f3c0e5f213e75b21318e78bcabfff9d1415", size = 198674, upload-time = "2026-07-10T08:50:37.887Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/c7/b0/003792df09decd6849a5e39c28b513c06e84436a54440380862b5aeff25d/tzdata-2025.3-py2.py3-none-any.whl", hash = "sha256:06a47e5700f3081aab02b2e513160914ff0694bce9947d6b76ebd6bf57cfc5d1", size = 348521, upload-time = "2025-12-13T17:45:33.889Z" },
+    { url = "https://files.pythonhosted.org/packages/e5/6d/b53b99a9f2766d095985947a5782f1702cabb129a34f7a802d7197af832f/tzdata-2026.3-py2.py3-none-any.whl", hash = "sha256:dc096730c87af6cab1b171c9d532be840741ff5d459015e7f6947bd7d7e54931", size = 348168, upload-time = "2026-07-10T08:50:36.46Z" },
 ]
 
 [[package]]