build: add microsoft tzdata dependency

Author: JoLo90

ci/requirements-py3.10.yml

@@ -25,3 +25,4 @@ dependencies:
     - pip:
         - nrel-pysam>=2.0
         - solarfactors
+        - tzdata; platform_system == "Windows"

ci/requirements-py3.11.yml

@@ -25,3 +25,4 @@ dependencies:
     - pip:
         - nrel-pysam>=2.0
         - solarfactors
+        - tzdata; platform_system == "Windows"

ci/requirements-py3.12.yml

@@ -25,3 +25,4 @@ dependencies:
     - pip:
         - nrel-pysam>=2.0
         - solarfactors
+        - tzdata; platform_system == "Windows"

ci/requirements-py3.13.yml

@@ -25,3 +25,4 @@ dependencies:
     - pip:
         - nrel-pysam>=2.0
         - solarfactors
+        - tzdata; platform_system == "Windows"

ci/requirements-py3.14.yml

@@ -25,3 +25,4 @@ dependencies:
     - pip:
         # - nrel-pysam>=2.0  # not available for py 3.14 as of 2025-11-03
         - solarfactors
+        - tzdata; platform_system == "Windows"

docs/sphinx/source/whatsnew/v0.15.2.rst

@@ -46,7 +46,8 @@ Benchmarking
 Requirements
 ~~~~~~~~~~~~
 * Removed ``pytz`` from core dependencies. ``zoneinfo`` (built into Python 3.9+)
-  is now used instead. (:ghuser:`JoLo90`, :pull:`2757`)
+  is now used instead. On Windows, the ``tzdata`` package is required and
+  installed automatically. (:ghuser:`JoLo90`, :pull:`2757`)
 
 
 Maintenance

pyproject.toml

@@ -16,6 +16,7 @@ dependencies = [
     'requests',
     'scipy >= 1.7.2',
     'h5py',
+    'tzdata; sys_platform == "win32"',
 ]
 license = "BSD-3-Clause"
 classifiers = [