diff --git a/src/accounting/report/reports/balance_sheet.py b/src/accounting/report/reports/balance_sheet.py
index dbc9349..2de235b 100644
--- a/src/accounting/report/reports/balance_sheet.py
+++ b/src/accounting/report/reports/balance_sheet.py
@@ -32,7 +32,7 @@ from accounting.report.utils.csv_export import BaseCSVRow, csv_download, \
     period_spec
 from accounting.report.utils.option_link import OptionLink
 from accounting.report.utils.period import Period
-from accounting.report.utils.period_choosers import PeriodChooser
+from accounting.report.utils.period_chooser import PeriodChooser
 from accounting.report.utils.report_chooser import ReportChooser
 from accounting.report.utils.report_type import ReportType
 from accounting.report.utils.urls import ledger_url, balance_sheet_url, \
diff --git a/src/accounting/report/reports/income_expenses.py b/src/accounting/report/reports/income_expenses.py
index dc35f88..7e4af3c 100644
--- a/src/accounting/report/reports/income_expenses.py
+++ b/src/accounting/report/reports/income_expenses.py
@@ -35,7 +35,7 @@ from accounting.report.utils.income_expense_account import \
     IncomeExpensesAccount
 from accounting.report.utils.option_link import OptionLink
 from accounting.report.utils.period import Period
-from accounting.report.utils.period_choosers import PeriodChooser
+from accounting.report.utils.period_chooser import PeriodChooser
 from accounting.report.utils.report_chooser import ReportChooser
 from accounting.report.utils.report_type import ReportType
 from accounting.report.utils.urls import income_expenses_url
diff --git a/src/accounting/report/reports/income_statement.py b/src/accounting/report/reports/income_statement.py
index 3cfa426..5f3d295 100644
--- a/src/accounting/report/reports/income_statement.py
+++ b/src/accounting/report/reports/income_statement.py
@@ -32,7 +32,7 @@ from accounting.report.utils.csv_export import BaseCSVRow, csv_download, \
     period_spec
 from accounting.report.utils.option_link import OptionLink
 from accounting.report.utils.period import Period
-from accounting.report.utils.period_choosers import PeriodChooser
+from accounting.report.utils.period_chooser import PeriodChooser
 from accounting.report.utils.report_chooser import ReportChooser
 from accounting.report.utils.report_type import ReportType
 from accounting.report.utils.urls import ledger_url, income_statement_url
diff --git a/src/accounting/report/reports/journal.py b/src/accounting/report/reports/journal.py
index 856c596..a5bcdb2 100644
--- a/src/accounting/report/reports/journal.py
+++ b/src/accounting/report/reports/journal.py
@@ -31,7 +31,7 @@ from accounting.report.utils.base_report import BaseReport
 from accounting.report.utils.csv_export import BaseCSVRow, csv_download, \
     period_spec
 from accounting.report.utils.period import Period
-from accounting.report.utils.period_choosers import PeriodChooser
+from accounting.report.utils.period_chooser import PeriodChooser
 from accounting.report.utils.report_chooser import ReportChooser
 from accounting.report.utils.report_type import ReportType
 from accounting.report.utils.urls import journal_url
diff --git a/src/accounting/report/reports/ledger.py b/src/accounting/report/reports/ledger.py
index 01ad719..9c297d9 100644
--- a/src/accounting/report/reports/ledger.py
+++ b/src/accounting/report/reports/ledger.py
@@ -33,7 +33,7 @@ from accounting.report.utils.csv_export import BaseCSVRow, csv_download, \
     period_spec
 from accounting.report.utils.option_link import OptionLink
 from accounting.report.utils.period import Period
-from accounting.report.utils.period_choosers import PeriodChooser
+from accounting.report.utils.period_chooser import PeriodChooser
 from accounting.report.utils.report_chooser import ReportChooser
 from accounting.report.utils.report_type import ReportType
 from accounting.report.utils.urls import ledger_url
diff --git a/src/accounting/report/reports/trial_balance.py b/src/accounting/report/reports/trial_balance.py
index 51d29d0..16656d6 100644
--- a/src/accounting/report/reports/trial_balance.py
+++ b/src/accounting/report/reports/trial_balance.py
@@ -31,7 +31,7 @@ from accounting.report.utils.csv_export import BaseCSVRow, csv_download, \
     period_spec
 from accounting.report.utils.option_link import OptionLink
 from accounting.report.utils.period import Period
-from accounting.report.utils.period_choosers import PeriodChooser
+from accounting.report.utils.period_chooser import PeriodChooser
 from accounting.report.utils.report_chooser import ReportChooser
 from accounting.report.utils.report_type import ReportType
 from accounting.report.utils.urls import ledger_url, trial_balance_url
diff --git a/src/accounting/report/utils/period_choosers.py b/src/accounting/report/utils/period_chooser.py
similarity index 99%
rename from src/accounting/report/utils/period_choosers.py
rename to src/accounting/report/utils/period_chooser.py
index f0e1282..01fd6eb 100644
--- a/src/accounting/report/utils/period_choosers.py
+++ b/src/accounting/report/utils/period_chooser.py
@@ -14,7 +14,7 @@
 #  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
-"""The period choosers.
+"""The period chooser.
 
 This file is largely taken from the NanoParma ERP project, first written in
 2021/9/16 by imacat (imacat@nanoparma.com).