Update locales/en.json

locales/en.json

@@ -52,6 +52,34 @@
   },
   "am_pm": ["AM", "PM"],
   "week_starts_on": 0,
+  "date_expressions": {
+    "today": "today",
+    "tomorrow": "tomorrow",
+    "yesterday": "yesterday",
+    "day_after_tomorrow": ["day after tomorrow", "the day after tomorrow"],
+    "this_week": "this week",
+    "next_week": "next week",
+    "this_weekend": "this weekend",
+    "this_saturday": "this Saturday",
+    "this_sunday": "this Sunday",
+    "next_saturday": "next Saturday",
+    "next_sunday": "next Sunday",
+    "in_x_days": "in {X} days",
+    "x_days_ago": "{X} days ago",
+    "next_month": "next month",
+    "last_month": "last month",
+    "this_month": "this month",
+    "this_year": "this year",
+    "next_year": "next year",
+    "last_year": "last year"
+  },
+  "date_patterns": {
+    "month_day": "{month} {day}",
+    "month_day_year": "{month} {day}, {year}",
+    "relative_days": ["today", "tomorrow", "day after tomorrow", "yesterday"],
+    "relative_weeks": ["this week", "next week", "last week"],
+    "relative_months": ["this month", "next month", "last month"]
+  },
   "common_phrases": {
     "yes": "Yes",
     "no": "No",