adding current date as default for cli args

util/str_to_datetime.py

@@ -0,0 +1,19 @@
+from datetime import datetime as dt
+
+
+def datetime(s: str) -> dt:
+    s = s.strip()
+
+    try:
+        return dt.strptime(s, '%d.%m.%y %H:%M')
+    except ValueError:
+        pass
+
+    try:
+        tim = dt.strptime(s, '%H:%M').time()
+        dat = dt.now().date()
+        return dt.combine(dat, tim)
+    except ValueError:
+        pass
+
+    raise ValueError("The given string can not be interpreted as a datetime.")