diff --git a/poetry.lock b/poetry.lock
index 5c596ccf..fe850a19 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 2.2.1 and should not be changed by hand.
+# This file is automatically @generated by Poetry 2.1.1 and should not be changed by hand.
 
 [[package]]
 name = "actfast"
@@ -687,7 +687,7 @@ description = "Backport of PEP 654 (exception groups)"
 optional = false
 python-versions = ">=3.7"
 groups = ["dev", "docs"]
-markers = "python_version == \"3.10\""
+markers = "python_version < \"3.11\""
 files = [
     {file = "exceptiongroup-1.3.1-py3-none-any.whl", hash = "sha256:a7a39a3bd276781e98394987d3a5701d0c4edffb633bb7a5144577f82c773598"},
     {file = "exceptiongroup-1.3.1.tar.gz", hash = "sha256:8b412432c6055b0b7d14c310000ae93352ed6754f70fa8f7c34141f91c4e3219"},
@@ -3324,7 +3324,7 @@ files = [
     {file = "tomli-2.4.0-py3-none-any.whl", hash = "sha256:1f776e7d669ebceb01dee46484485f43a4048746235e683bcdffacdf1fb4785a"},
     {file = "tomli-2.4.0.tar.gz", hash = "sha256:aa89c3f6c277dd275d8e243ad24f3b5e701491a860d5121f2cdd399fbb31fc9c"},
 ]
-markers = {dev = "python_full_version <= \"3.11.0a6\"", docs = "python_version == \"3.10\""}
+markers = {dev = "python_full_version <= \"3.11.0a6\"", docs = "python_version < \"3.11\""}
 
 [[package]]
 name = "tornado"
@@ -3332,7 +3332,7 @@ version = "6.5.5"
 description = "Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed."
 optional = false
 python-versions = ">=3.9"
-groups = ["dev", "docs"]
+groups = ["docs"]
 files = [
     {file = "tornado-6.5.5-cp39-abi3-macosx_10_9_universal2.whl", hash = "sha256:487dc9cc380e29f58c7ab88f9e27cdeef04b2140862e5076a66fb6bb68bb1bfa"},
     {file = "tornado-6.5.5-cp39-abi3-macosx_10_9_x86_64.whl", hash = "sha256:65a7f1d46d4bb41df1ac99f5fcb685fb25c7e61613742d5108b010975a9a6521"},
@@ -3407,6 +3407,18 @@ files = [
 [package.dependencies]
 typing-extensions = ">=4.12.0"
 
+[[package]]
+name = "tzdata"
+version = "2025.3"
+description = "Provider of IANA time zone data"
+optional = false
+python-versions = ">=2"
+groups = ["main"]
+files = [
+    {file = "tzdata-2025.3-py2.py3-none-any.whl", hash = "sha256:06a47e5700f3081aab02b2e513160914ff0694bce9947d6b76ebd6bf57cfc5d1"},
+    {file = "tzdata-2025.3.tar.gz", hash = "sha256:de39c2ca5dc7b0344f2eba86f49d614019d29f060fc4ebc8a417896a620b56a7"},
+]
+
 [[package]]
 name = "urllib3"
 version = "2.6.3"
@@ -3692,4 +3704,4 @@ type = ["pytest-mypy"]
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.10, <3.14"
-content-hash = "1f5808203533274de3dd46ed74b64343a2ebcf090fb1aa65aa8d68832f4aa254"
+content-hash = "964a8ad31fd613af1dc0f1bc750387c9b92db4cbc40d27dd2289e28a96dafedb"
diff --git a/pyproject.toml b/pyproject.toml
index 0510ca8e..2fb5419a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "wristpy"
-version = "0.2.6"
+version = "0.2.7"
 description = "wristpy is a Python package designed for processing and analyzing wrist-worn accelerometer data."
 authors = [
   "Adam Santorelli <adam.santorelli@childmind.org>",
@@ -25,6 +25,7 @@ pydantic-settings = "^2.3.4"
 scipy = "^1.14.1"
 typer = ">=0.20.0"
 rich = "^14.1.0"
+tzdata = "^2025.3"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^8.0.0"
diff --git a/src/wristpy/io/readers/readers.py b/src/wristpy/io/readers/readers.py
index b1dd34bc..a589d79d 100644
--- a/src/wristpy/io/readers/readers.py
+++ b/src/wristpy/io/readers/readers.py
@@ -2,6 +2,7 @@
 
 import datetime
 import pathlib
+import zoneinfo
 from typing import Literal, Union
 
 import actfast
@@ -220,9 +221,11 @@ def _read_actigraph_csv(
     start_time = lines[2].strip().split()[-1]
     start_date = lines[3].strip().split()[-1]
 
+    ny_tz = zoneinfo.ZoneInfo("America/New_York")
     start_datetime = datetime.datetime.strptime(
         f"{start_date} {start_time}", "%d/%m/%Y %H:%M:%S"
-    )
+    ).replace(tzinfo=ny_tz)
+
     idle_sleep_mode_value = lines[4].strip().split()[-1]
     idle_sleep_mode_flag = idle_sleep_mode_value.lower() == "true"
     sampling_rate = int(lines[5].strip().split()[-1])