diff --git a/pomodoro_to_harvest.py b/pomodoro_to_harvest.py
index af3ee98..6363c7f 100644
--- a/pomodoro_to_harvest.py
+++ b/pomodoro_to_harvest.py
@@ -89,6 +89,23 @@ timelog['description'] = (np.where(timelog['description'].str.contains(': '), ti
 timelog['description'] = timelog['description'].str.strip()
 timelog['project'] = timelog['project'].str.strip()
 
+timelog['tmp_timeshift'] = timelog['description'].str.extract(r'^(\(.+)\)', expand=False)
+timelog['tmp_timeshift'] = timelog['tmp_timeshift'].str.strip().str.replace("(","")
+# In an ideal world we would use https://github.com/bear/parsedatetime or similar and
+# even better figure out the right date for strings like "Monday" but eh this'll do.
+timeshift_days = {
+    -1: ['one day ago', '1 day ago', 'yesterday'],
+    -2: ['two days ago', '2 days ago', 'day before yesterday', 'the day before yesterday'],
+    -3: ['three days ago', '3 days ago'],
+    -4: ['four days ago', '4 days ago'],
+    -5: ['five days ago', '5 days ago'],
+}
+for days, phrases in timeshift_days.items():
+    phrases.append(str(days))
+    timelog.loc[timelog.tmp_timeshift.str.lower().isin(phrases), "tmp_daysdelta"] = int(days)
+timelog['tmp_daysdelta'] = timelog['tmp_daysdelta'].fillna(0)
+timelog['date'] = timelog['date'] + pd.to_timedelta(timelog['tmp_daysdelta'], unit='D') 
+
 # If a multiplier has been provided (an asterisk and an integer at the end of a
 # task), then multiply the time by it and remove it from the description.
 # Ensure we're splitting on the same asterisk we found:  Use the end of string