BP 758: Fixed a bug in the date picker validator

src/app/shared/validators/datepicker.validator.ts

diff --git a/src/app/shared/validators/datepicker.validator.ts b/src/app/shared/validators/datepicker.validator.ts
index 680220d..1b52166 100644
--- a/src/app/shared/validators/datepicker.validator.ts
+++ b/src/app/shared/validators/datepicker.validator.ts
@@ -18,9 +18,9 @@
                     validTo.updateValueAndValidity({ onlySelf: true });
                 });
                 const validFromValue = validFrom.value;
-                const validFromDateObj = new Date(validFromValue.year, validFromValue.month, validFromValue.day, 0, 0, 0, 0);
+                const validFromDateObj = new Date(validFromValue.year, validFromValue.month - 1, validFromValue.day, 0, 0, 0, 0);
                 const validToValue = validTo.value;
-                const validToDateObj = new Date(validToValue.year, validToValue.month, validToValue.day, 0, 0, 0, 0);
+                const validToDateObj = new Date(validToValue.year, validToValue.month - 1, validToValue.day, 0, 0, 0, 0);
                 if (validFromDateObj > validToDateObj) {
                     return { invalidDate: true };
                 }