diff --git a/TODO.org b/TODO.org
index 2899dd4..238e5bd 100644
--- a/TODO.org
+++ b/TODO.org
@@ -6,10 +6,10 @@ https://github.com/oshev/colifer/blob/592cc6b4d1ac9005c52fccdfb4e207513812baaa/c
 https://github.com/oshev/colifer/blob/592cc6b4d1ac9005c52fccdfb4e207513812baaa/reportextenders/jawbone/jawbone_sleep.py
 https://github.com/GlenCrawford/ruby_jawbone
 
-* TODO extract sleep intervals
-https://jawbone.com/up/developer/endpoints/sleeps
-sleep phases here
-
-
 * https://nyquist212.wordpress.com/2015/06/22/visualizing-jawbone-up-data-with-d3-js/
 
+
+* jawbone sleeps meta:
+** time_created: apparently starto of sleep (leftmost point of plot)
+** time_updated: rightmost point of plot
+** details -> asleep_time, awake_time
diff --git a/analyse.py b/analyse.py
new file mode 100755
index 0000000..aea34ff
--- /dev/null
+++ b/analyse.py
@@ -0,0 +1,48 @@
+#!/usr/bin/env python3.6
+from kython import *
+
+from backup_config import SLEEPS_FILE
+
+from datetime import datetime
+from datetime import date
+
+XID = str # TODO how to shared with backup thing?
+
+class SleepEntry:
+    def __init__(self, js) -> None:
+        self.js = js
+
+    # TODO @memoize decorator?
+    def date_(self) -> date:
+        dates = str(self.js['date'])
+        return datetime.strptime(dates, "%Y%m%d").date()
+
+    def title(self) -> str:
+        return self.js['title']
+
+    def xid(self) -> XID:
+        return self.js['xid']
+
+    def _details(self):
+        return self.js['details']
+
+    # TODO take timezones into account?
+    def created(self) -> datetime:
+        return datetime.fromtimestamp(self.js['time_created'])
+
+    def completed(self) -> datetime:
+        return datetime.fromtimestamp(self.js['time_completed'])
+
+    def __str__(self) -> str:
+        return f"{self.date_()} {self.title()}"
+
+    def __repr__(self) -> str:
+        return str(self)
+
+def load_sleeps() -> List[SleepEntry]:
+    with open(SLEEPS_FILE, 'r') as fo:
+        sleeps = json_load(fo)
+        return [SleepEntry(js) for js in sleeps]
+
+sleeps = load_sleeps()
+pprint(sleeps[:2])