diff --git a/vlorentz/summer_planning.py b/vlorentz/summer_planning.py
index 9e1ab08..7b8a226 100644
--- a/vlorentz/summer_planning.py
+++ b/vlorentz/summer_planning.py
@@ -1,125 +1,125 @@
 import datetime
 import enum
 import html.parser
 import os
 import pprint
 import re
 
 import colorama
 import requests
 
 START_DAY = datetime.date.fromisoformat("2021-06-28")  # must be a monday
 END_DAY = datetime.date.fromisoformat("2021-08-31")
 INTERVAL_RE = re.compile(r"~?([0-9-]+)\s*→\s*~?([0-9-]+)")
 URL = "https://intranet.softwareheritage.org/api.php?action=parse&page=Summer_planning_2021&format=json"
 AUTH_LOGIN = os.environ["SWH_INTRANET_LOGIN"]
 AUTH_PASSWORD = os.environ["SWH_INTRANET_PASSWORD"]
 
 
 class Modes(enum.Enum):
     TITLE = enum.auto()
     IN_SECTION = enum.auto()
     IN_TABLE = enum.auto()
 
 
 class Parser(html.parser.HTMLParser):
     stack = []
     current_mode = None
     current_table = None
     current_person = None
 
     def __init__(self):
         super().__init__()
         self.tables = {}
 
     def handle_starttag(self, tag, attrs):
         self.stack.append((tag, attrs))
         if tag == "h2":
             self.current_mode = Modes.TITLE
             self.current_person = ""
         elif tag == "table":
             self.current_mode = Modes.IN_TABLE
             self.current_table = []
         elif tag == "tr":
             self.current_table.append([])
         elif tag in ("td", "th"):
             self.current_table[-1].append("")
 
     def handle_endtag(self, tag):
         while self.stack[-1][0] != tag:
             del self.stack[-1]
         if tag == "h2":
             self.current_mode = Modes.IN_SECTION
         elif tag == "table":
             self.current_table = self.current_table[1:]  # drop header
             self.tables[self.current_person] = self.current_table
             self.current_mode = Modes.IN_SECTION
             self.current_table = None
 
     def handle_data(self, data):
         data = data.strip()
         if not data:
             return
         if self.current_mode == Modes.TITLE:
             if not self.current_person:
                 self.current_person = data
         elif self.current_mode == Modes.IN_TABLE:
             self.current_table[-1][-1] += data
 
 
 def print_calendar(tables):
     one_week = datetime.timedelta(weeks=1)
     one_work_week = datetime.timedelta(days=5)
     current_day = START_DAY
 
     current_line = []
     def append_cell(s, color=""):
         current_line.append(f"{color}{s:^15.15}{colorama.Style.RESET_ALL}")
     def flush_row():
         nonlocal current_line
         print(" ".join(current_line))
         current_line = []
 
     # header
     append_cell("week:")
     while current_day < END_DAY:
         append_cell(current_day.isoformat())
         current_day += one_week
     flush_row()
 
     append_cell("(date=monday)")
     flush_row()
 
     for (person, table) in tables.items():
         current_day = START_DAY
         intervals = [INTERVAL_RE.match(row[0]) for row in table if "holiday" in row[1].lower() or "vacation" in row[1].lower()]
         intervals = [tuple(map(datetime.date.fromisoformat, interval.groups())) for interval in intervals]
         append_cell(person)
         while current_day < END_DAY:
             color = colorama.Fore.WHITE + colorama.Back.BLACK
             status = "working"
             for (start, end) in intervals:
                 if start <= current_day and current_day+one_work_week <= end:
                     color = colorama.Fore.WHITE + colorama.Back.BLUE
                     status = "not working"
-                elif current_day <= start <= current_day+one_work_week or current_day <= end <= current_day+one_work_week:
+                elif current_day <= start < current_day+one_work_week or current_day <= end < current_day+one_work_week:
                     color = colorama.Fore.BLACK + colorama.Back.YELLOW
                     status = "partial"
             append_cell(status, color=color)
             current_day += one_week
         flush_row()
 
 
 def main():
     data = requests.get(URL, auth=(AUTH_LOGIN, AUTH_PASSWORD))
     html = data.json()["parse"]["text"]["*"]
 
     p = Parser()
     p.feed(html)
 
     print_calendar(p.tables)
 
 
 if __name__ == "__main__":
     main()