Changes that hopefully solve this problem (#291)

* Changes that hopefully solve this problem

* Add tzdata dependency for windows

Author: Asanto32

poetry.lock

@@ -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"

pyproject.toml

@@ -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])