Unable to parse "12am last monday", and "12am monday" defaults to the upcoming monday

It looks like several of these formats cannot be parsed. It looks like "monday" is converted to this week's Monday (since today is Sunday, that is tomorrow).

Is there a way to get "last monday" from Dateparser? "Last week" works, but not "Last Monday" nor "Last Week on Monday"

#!/usr/bin/env python3
import dateparser

print(f"Now:            {dateparser.parse('now')}")
print(f"Monday:         {dateparser.parse('monday')}")
print(f"This Monday:    {dateparser.parse('this monday')}")
print(f"Last Monday:    {dateparser.parse('last monday')}")
print(f"Last Week:      {dateparser.parse('last week')}")
print(f"Last Week@6:    {dateparser.parse('last week at 6am')}")
print(f"Last Week Mon:  {dateparser.parse('last week on Monday')}")
print(f"A Week Ago:     {dateparser.parse('a week ago')}")
print(f"A Week Ago Mon: {dateparser.parse('a week ago on Monday')}")

Now:            2021-03-28 21:23:52.948271
Monday:         2021-03-29 00:00:00
This Monday:    None
Last Monday:    None
Last Week:      2021-03-21 21:23:54.180324
Last Week@6:    2021-03-21 06:00:00
Last Week Mon:  None
A Week Ago:     2021-03-21 21:23:54.201582
A Week Ago Mon: None

Start by running the reproduction script through dateparser.parse and trace how weekday and relative-date expressions are handled. Add regression coverage for the listed Monday and midnight cases, then verify that the requested expressions parse with the intended previous-week results instead of returning None or selecting the upcoming Monday.