diff --git a/CITATION.cff b/CITATION.cff
index c51930e..deeb5e7 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -31,5 +31,5 @@ keywords:
   - spectroscopy
   - deshima
 license: MIT
-version: 2024.7.2
-date-released: '2024-07-22'
+version: 2024.7.3
+date-released: '2024-07-27'
diff --git a/README.md b/README.md
index 47164fd..896d905 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ DESHIMA merge code for observed datasets
 ## Installation
 
 ```shell
-pip install demerge==2024.7.2
+pip install demerge==2024.7.3
 ```
 
 ## Command line interface
@@ -37,18 +37,19 @@ FLAGS
     --data_dir=DATA_DIR
         Type: Path
         Default: PosixPath('.')
-        Path where raw data directory is placed,
+        Path of directory where data packages are placed,
         i.e. expecting ``${data_dir}/cosmos_YYYYmmddHHMMSS``.
     --dems_dir=DEMS_DIR
         Type: Path
         Default: PosixPath('.')
-        Path where merged DEMS file will be placed,
+        Path of directory where merged DEMS will be placed,
         i.e. expecting ``${dems_dir}/dems_YYYYmmddHHMMSS.zarr.zip``.
     --reduced_dir=REDUCED_DIR
         Type: Path
         Default: PosixPath('.')
-        Path where reduced data directory will be placed,
+        Path of directory where reduced packages are placed,
         i.e. expecting ``${reduced_dir}/reduced_YYYYmmddHHMMSS``.
+        If not specified, a temporary directory will be used.
     --ddb=DDB
         Type: Path
         Default: PosixPath('/path/to/demerge/data/ddb_20240713.fits')
@@ -60,7 +61,7 @@ FLAGS
     --overwrite=OVERWRITE
         Type: bool
         Default: False
-        If True, reduced data directory and merged DEMS file
+        If True, the reduced package and the merged DEMS file
         will be overwritten even if they exist.
     --debug=DEBUG
         Type: bool
diff --git a/demerge/__init__.py b/demerge/__init__.py
index 9b4c113..4ceaef7 100644
--- a/demerge/__init__.py
+++ b/demerge/__init__.py
@@ -1,5 +1,5 @@
 __all__ = ["data", "demerge", "merge", "reduce"]
-__version__ = "2024.7.2"
+__version__ = "2024.7.3"
 
 
 # standard library
@@ -77,7 +77,7 @@ def demerge(
             If not specified, a temporary directory will be used.
         ddb: Path of DDB (DESHIMA database) file.
         measure: Measure of the DEMS (either df/f or brightness).
-        overwrite: If True, reduced data directory and merged DEMS file
+        overwrite: If True, the reduced package and the merged DEMS file
             will be overwritten even if they exist.
         debug: If True, detailed logs for debugging will be printed.
         **options: Other merge options for the merge command.
diff --git a/demerge/merge/utils.py b/demerge/merge/utils.py
index 2f8b824..090bcf0 100644
--- a/demerge/merge/utils.py
+++ b/demerge/merge/utils.py
@@ -79,7 +79,7 @@
 DATE_PARSER_ANTENNA = lambda s: dt.strptime(s, "%Y%m%d%H%M%S.%f")
 DATE_PARSER_CABIN = lambda s: dt.strptime(s, "%Y/%m/%d %H:%M")
 DATE_PARSER_MISTI = lambda s: dt.strptime(s, "%Y/%m/%d %H:%M:%S.%f")
-DATE_PARSER_SKYCHOP = lambda s: dt.fromtimestamp(float(s))
+DATE_PARSER_SKYCHOP = lambda s: dt.utcfromtimestamp(float(s))
 DATE_PARSER_WEATHER = lambda s: dt.strptime(s, "%Y%m%d%H%M%S")
 PACKAGE_DATA = Path(__file__).parents[1] / "data"
 
diff --git a/pyproject.toml b/pyproject.toml
index 0f86b53..1b9e56b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "demerge"
-version = "2024.7.2"
+version = "2024.7.3"
 description = "DESHIMA merge code for observed datasets"
 authors = [
     "Tatsuya Takekoshi <tatsuya.takekoshi@gmail.com>",