diff --git a/sigi/apps/convenios/admin.py b/sigi/apps/convenios/admin.py
index 011ccf2..b66d7ce 100644
--- a/sigi/apps/convenios/admin.py
+++ b/sigi/apps/convenios/admin.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 from django.contrib import admin
+from django.contrib.admin.views.main import ChangeList
 from sigi.apps.convenios.models import Projeto, Convenio, EquipamentoPrevisto, Anexo, Tramitacao, UnidadeAdministrativa
 from sigi.apps.casas.models import CasaLegislativa
 from sigi.apps.servicos.models import Servico
@@ -68,6 +69,26 @@ class ConvenioAdmin(admin.ModelAdmin):
     get_uf.admin_order_field = 'casa_legislativa__municipio__uf__sigla'
 
     def changelist_view(self, request, extra_context=None):
+        import re
+        request.GET._mutable=True
+        if 'data_retorno_assinatura__gte' in request.GET:
+            value = request.GET.get('data_retorno_assinatura__gte','')
+            if value == '':
+                del request.GET['data_retorno_assinatura__gte']
+            elif re.match('^\d*$', value): # Year only
+                request.GET['data_retorno_assinatura__gte'] = "%s-01-01" % value #Complete with january 1st
+            elif re.match('^\d*\D\d*$', value): # Year and month 
+                request.GET['data_retorno_assinatura__gte'] = '%s-01' % value #Complete with 1st day of month
+        if 'data_retorno_assinatura__lte' in request.GET:
+            value = request.GET.get('data_retorno_assinatura__lte','')
+            if value == '':
+                del request.GET['data_retorno_assinatura__lte']
+            elif re.match('^\d*$', value): # Year only
+                request.GET['data_retorno_assinatura__lte'] = "%s-01-01" % value #Complete with january 1st
+            elif re.match('^\d*\D\d*$', value): # Year and month 
+                request.GET['data_retorno_assinatura__lte'] = '%s-01' % value #Complete with 1st day of month
+        request.GET._mutable=False
+        
         return super(ConvenioAdmin, self).changelist_view(
             request,
             extra_context={'query_str': '?' + request.META['QUERY_STRING']}
@@ -103,7 +124,6 @@ class ConvenioAdmin(admin.ModelAdmin):
     def lookup_allowed(self, lookup, value):
         return super(ConvenioAdmin, self).lookup_allowed(lookup, value) or \
             lookup in ['casa_legislativa__municipio__uf__codigo_ibge__exact']
-    
 
 class EquipamentoPrevistoAdmin(admin.ModelAdmin):
     list_display = ('convenio', 'equipamento', 'quantidade')
diff --git a/sigi/apps/convenios/templates/convenios/change_list.html b/sigi/apps/convenios/templates/convenios/change_list.html
index eea3b0c..a3ea917 100644
--- a/sigi/apps/convenios/templates/convenios/change_list.html
+++ b/sigi/apps/convenios/templates/convenios/change_list.html
@@ -1,5 +1,5 @@
 {% extends "admin/change_list.html" %}
-{% load i18n reporting_tags  %}
+{% load i18n reporting_tags  admin_list %}
 
 {% block extrastyle %}  
   {{ block.super }}
@@ -21,3 +21,20 @@
     
   {% endif %}
 {% endblock %}
+
+{% block search %}
+<div id="toolbar">
+  <form id="changelist-search" action="" method="get">
+    <div><!-- DIV needed for valid HTML -->
+      <label for="searchbar"><img src="/sigi/admin_media/img/admin/icon_searchbox.png" alt="Search" /></label>
+      <input type="text" size="40" name="q" value="" id="searchbar" />
+      <label for="data_retorno_assinatura__gte">Conveniadas a partir de:</label>
+      <input type="text" size="10" name="data_retorno_assinatura__gte" value="" id="data_retorno_assinatura__gte" class="vDateField"/>
+      <label for="data_retorno_assinatura__lte">até:</label>
+      <input type="text" size="10" name="data_retorno_assinatura__lte" value="" id="data_retorno_assinatura__lte" />
+      <input type="submit" value="Pesquisar" />
+      Datas podem ser: Um ano (aaaa), um mês (aaaa-mm) ou um dia (aaaa-mm-dd)
+    </div>
+  </form>
+</div>
+{% endblock %}