Feature/improve date validation in activity endpoints (#3489)

* Improve date validation

* Update changelog

libs/common/src/lib/validator-constraints/is-after-1970.ts

@@ -0,0 +1,16 @@
+import {
+  ValidatorConstraint,
+  ValidatorConstraintInterface
+} from 'class-validator';
+import { format, isAfter, parseISO } from 'date-fns';
+
+@ValidatorConstraint({ name: 'isAfter1970' })
+export class IsAfter1970Constraint implements ValidatorConstraintInterface {
+  public defaultMessage() {
+    return `date must be after ${format(new Date(0), 'yyyy')}`;
+  }
+
+  public validate(aDateString: string) {
+    return isAfter(parseISO(aDateString), new Date(0));
+  }
+}