diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0906b48..d98d519 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,12 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
-## [v0.3.2] - 2020-01-022
+## [v0.3.3] - 2020-01-23
+
+### Fixed
+- Spelling of requester pays (was requestor)
+
+## [v0.3.2] - 2020-01-22
 
 ### Changed
 - sat-stac now compatible with Python3 versions < 3.6 ()
@@ -74,6 +79,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 Initial Release
 
 [Unreleased]: https://github.com/sat-utils/sat-stac/compare/master...develop
+[v0.3.3]: https://github.com/sat-utils/sat-stac/compare/0.3.2...v0.3.3
 [v0.3.2]: https://github.com/sat-utils/sat-stac/compare/0.3.1...v0.3.2
 [v0.3.1]: https://github.com/sat-utils/sat-stac/compare/0.3.0...v0.3.1
 [v0.3.0]: https://github.com/sat-utils/sat-stac/compare/0.2.0...v0.3.0
diff --git a/satstac/item.py b/satstac/item.py
index 44ded20..e27717b 100644
--- a/satstac/item.py
+++ b/satstac/item.py
@@ -134,7 +134,7 @@ def download_assets(self, keys=None, **kwargs):
             filenames.append(self.download(key, **kwargs))
         return filenames
 
-    def download(self, key, overwrite=False, path='', filename='${id}', requestor_pays=False):
+    def download(self, key, overwrite=False, path='', filename='${id}', requester_pays=False):
         """ Download this key (e.g., a band, or metadata file) from the scene """
         asset = self.asset(key)
         if asset is None:
@@ -148,7 +148,7 @@ def download(self, key, overwrite=False, path='', filename='${id}', requestor_pa
             ext = os.path.splitext(asset['href'])[1]
             fout = os.path.join(_path, fname + '_' + key + ext)
             if not os.path.exists(fout) or overwrite:
-                _filename = utils.download_file(asset['href'], filename=fout, requestor_pays=requestor_pays)
+                _filename = utils.download_file(asset['href'], filename=fout, requester_pays=requester_pays)
             else:
                 _filename = fout
         except Exception as e:
diff --git a/satstac/itemcollection.py b/satstac/itemcollection.py
index 859d927..59158c1 100644
--- a/satstac/itemcollection.py
+++ b/satstac/itemcollection.py
@@ -127,15 +127,15 @@ def summary(self, params=[]):
             txt += ''.join(['{:<25} '.format(s.substitute('${%s}' % p)) for p in params]) + '\n'
         return txt
 
-    def calendar(self):
+    def calendar(self, group='platform'):
         """ Get calendar for dates """
         date_labels = {}
         for d in self.dates():
-            sensors = self.properties('eo:platform', d)
-            if len(sensors) > 1:
+            groups = self.properties(group, d)
+            if len(groups) > 1:
                 date_labels[d] = 'Multiple'
             else:
-                date_labels[d] = sensors[0]
+                date_labels[d] = groups[0]
         return terminal_calendar(date_labels)
 
     def save(self, filename):
diff --git a/satstac/utils.py b/satstac/utils.py
index 39a713a..5f96d39 100644
--- a/satstac/utils.py
+++ b/satstac/utils.py
@@ -52,14 +52,14 @@ def dict_merge(dct, merge_dct, add_keys=True):
     return dct
 
 
-def download_file(url, filename=None, requestor_pays=False):
+def download_file(url, filename=None, requester_pays=False):
     """ Download a file as filename """
     filename = os.path.basename(url) if filename is None else filename
     logger.info('Downloading %s as %s' % (url, filename))
     headers = {}
     # check if on s3, if so try to sign it
     if 's3.amazonaws.com' in url:
-        signed_url, signed_headers = get_s3_signed_url(url, requestor_pays=requestor_pays)
+        signed_url, signed_headers = get_s3_signed_url(url, requester_pays=requester_pays)
         resp = requests.get(signed_url, headers=signed_headers, stream=True)
         if resp.status_code != 200:
             resp = requests.get(url, headers=headers, stream=True)
@@ -98,7 +98,7 @@ def splitall(path):
     return allparts
 
 
-def get_s3_signed_url(url, rtype='GET', public=False, requestor_pays=False, content_type=None):
+def get_s3_signed_url(url, rtype='GET', public=False, requester_pays=False, content_type=None):
     access_key = os.environ.get('AWS_BUCKET_ACCESS_KEY_ID', os.environ.get('AWS_ACCESS_KEY_ID'))
     secret_key = os.environ.get('AWS_BUCKET_SECRET_ACCESS_KEY', os.environ.get('AWS_SECRET_ACCESS_KEY'))
     region = os.environ.get('AWS_BUCKET_REGION', os.environ.get('AWS_REGION', 'eu-central-1'))
@@ -142,7 +142,7 @@ def getSignatureKey(key, dateStamp, regionName, serviceName):
         'x-amz-content-sha256': payload_hash,
         'x-amz-date': amzdate
     }
-    if requestor_pays:
+    if requester_pays:
         headers['x-amz-request-payer'] = 'requester'
     if public:
         headers['x-amz-acl'] = 'public-read'
diff --git a/satstac/version.py b/satstac/version.py
index 73e3bb4..80eb7f9 100644
--- a/satstac/version.py
+++ b/satstac/version.py
@@ -1 +1 @@
-__version__ = '0.3.2'
+__version__ = '0.3.3'