diff --git a/import2ledger/importers/nbpy2017.py b/import2ledger/importers/nbpy2017.py
index 993c8b962ce959418583681c7ca0a26d1be255d0..660189d1ccbfcf77c26386496f4030afbe5a4392 100644
--- a/import2ledger/importers/nbpy2017.py
+++ b/import2ledger/importers/nbpy2017.py
@@ -9,7 +9,7 @@ class Invoice2017:
     DISCOUNT_TICKET_RATE = STANDARD_TICKET_RATE / 2
     STANDARD_SHIRT_RATE = decimal.Decimal('25.50')
     DISCOUNT_SHIRT_RATE = STANDARD_SHIRT_RATE
-    DATE_FMT = '%b. %d, %Y,'
+    DATE_FMT = '%b. %d, %Y'
     CURRENCY = 'USD'
 
     @classmethod
@@ -81,10 +81,9 @@ class Invoice2017:
 
     def _read_invoice_activity(self, table, first_row_text, rows_text):
         self.actions = []
-        date_wordcount = self.DATE_FMT.count(' ') + 1
         for timestamp, description, amount in rows_text:
             if description.startswith('Paid '):
-                last_stripe_id = description.rsplit(None, 1)[1]
+                last_stripe_id = util.rslice_words(description, 1, limit=1)
                 action = {
                     'multiplier': 1,
                     'payment_id': last_stripe_id,
@@ -93,8 +92,8 @@ class Invoice2017:
                 # Refund handling could go here, if we need it.
                 continue
             # Trim extraneous text like the time/a.m./p.m.
-            date_words = timestamp.split(' ', date_wordcount + 1)[:date_wordcount]
-            action['date'] = util.strpdate(' '.join(date_words), self.DATE_FMT)
+            date_str = util.rejoin_slice_words(timestamp, slice(2), ',', 2)
+            action['date'] = util.strpdate(date_str, self.DATE_FMT)
             action['stripe_id'] = last_stripe_id
             self.actions.append(action)