diff --git a/pay_by_square.py b/pay_by_square.py
index b37ff8c..5b623b6 100644
--- a/pay_by_square.py
+++ b/pay_by_square.py
@@ -1,6 +1,7 @@
 import lzma
 import binascii
-from datetime import datetime
+from typing import Optional
+from datetime import datetime, date
 
 
 def generate(
@@ -8,6 +9,7 @@ def generate(
     amount: float,
     iban: str,
     swift: str = '',
+    date: Optional[date] = None,
     beneficiary_name: str = '',
     currency: str = 'EUR',
     variable_symbol: str = '',
@@ -19,8 +21,13 @@ def generate(
 ) -> str:
     '''Generate pay-by-square code that can by used to create QR code for
     banking apps
+
+    When date is not provided current date will be used.
     '''
 
+    if date is None:
+        date = datetime.now()
+
     # 1) create the basic data structure
     data = '\t'.join(
         [
@@ -29,7 +36,7 @@ def generate(
             '1',  # simple payment
             f'{amount:.2f}',
             currency,
-            datetime.now().strftime('%Y%m%d'),
+            date.strftime('%Y%m%d'),
             variable_symbol,
             constant_symbol,
             specific_symbol,
diff --git a/tests.py b/tests.py
index 9fd3723..36ba262 100644
--- a/tests.py
+++ b/tests.py
@@ -1,48 +1,65 @@
+from datetime import date
 from unittest import TestCase, main
 
 from pay_by_square import generate
 
 
 class TestPayBySquare(TestCase):
-    def test(self):
+    def test_amount_iban(self):
         self.assertEqual(
-            generate(amount=1, iban='SK7700000000000000000000'),
-            '00044000DULVORPA054O3Q3S5TOTRH7S1PGF5J19UGS6EJQA7JEIN75VVFUSNSV3'
-            '9T51EA4H07727VVURLU00',
+            generate(amount=1, iban='SK7700000000000000000000', date=date(2020, 7, 5)),
+            '000440007S3VT0DFSETNDU5J8KF4EI1MT7B3BBH3P91D830QDBA6IRPF97451V4U'
+            '11PHMI423IDK7VVU5P800',
         )
+
+    def test_amount_iban_swift(self):
         self.assertEqual(
-            generate(amount=1, iban='SK7700000000000000000000', swift='FIOZSKBAXXX'),
-            '0004Q000D6VLDPM892PSOAVJ4R1ATTVSV98NUI3DFIPR7D4QQ4KONF90F526KCRO'
-            'I8BLQ82MPPSR0USOHGD9NAC1K1N014FVVUMDPG00',
+            generate(
+                amount=1,
+                iban='SK7700000000000000000000',
+                swift='FIOZSKBAXXX',
+                date=date(2020, 7, 5),
+            ),
+            '0004Q000DS03UHKLF59M2IK7FUCM3SBUK5FM62CCKLR4QOKAJSBPPL4ND4R66LSI'
+            '1K92GURM0FH5E3DASNBTNAKASV94PB5VVU1BRO00',
         )
+
+    def test_amount_iban_symbols(self):
         self.assertEqual(
             generate(
                 amount=1,
                 iban='SK7700000000000000000000',
+                date=date(2020, 7, 5),
                 variable_symbol='11',
                 constant_symbol='22',
                 specific_symbol='33',
             ),
-            '0004G0008OV1L1JQP2PSOAVJ4R1ATTVSV98NUI3DFIPR7D7LM1EV7HET0A1P82ES'
-            'R1S31L45TSU1KEC8QMSRJDVVHRLVVVS3E5000',
+            '0004G000EIUCQ7TO82O7GRAEMT06773UPLKOEC76BV3NBBNP7HPVSSJHUNVFBD7G'
+            '6DAAMTDL4B8ND4D06QCNS7PHMPBVVVROGU000',
         )
+
+    def test_amount_iban_symbols_beneficiary_name(self):
         self.assertEqual(
             generate(
                 amount=1,
                 iban='SK7700000000000000000000',
+                date=date(2020, 7, 5),
                 variable_symbol='11',
                 constant_symbol='22',
                 specific_symbol='33',
                 beneficiary_name='Foo',
             ),
-            '0004M0009KHOVQ8LKP6SS5PM8L1RE2O72SM9D7B0J1OEIB5IFNPSCAO1QQNHFMAC'
-            'KQB05H5SVO5TFHJB0A365357DHD40O3ORU1FVTIPFO00',
+            '0004M0006MISSBD0SBV1135OEDE05KA7IM2GBI0U0M5LHD5LIEP7D9CJO6T8GQDF'
+            'UKCL7TOEGN8TDOVAJ2GL85IOEA8OV3O1AQOFVU3JKS00',
         )
+
+    def test_pass_all_arguments(self):
         self.assertEqual(
             generate(
                 amount=1,
                 iban='SK7700000000000000000000',
                 swift='FIOZSKBAXXX',
+                date=date(2020, 7, 5),
                 variable_symbol='11',
                 constant_symbol='22',
                 specific_symbol='33',
@@ -51,9 +68,9 @@ def test(self):
                 beneficiary_address_2='address 2',
                 note='money',
             ),
-            '0006Q000AEC7VBLGJROL8RIVGVK02C4MMLA7T6LKCVDOIJFK1QUJ4DS1J52UEIP5'
-            'IVSLPQ2MG18S424V3SE9403C9GLRN4QNH6EQV7T0G4M143O82OO87MLAL2K6MFO3'
-            '3T7ET83B3IM8AS7VVTIIR000',
+            '0006Q0006GO7VIPNP2PPLDV1MO04PTB6C4OSM4KU3JKSDNJLJ0GBAT9GTI9DD7MF'
+            'QKGMLI4RD7996S1K78MKT8S0F46HK5TF6A6GP881BBMM66JVFMBBSM9KQRM2TN2V'
+            'RABUV7KFD22BFFIVVTFKO000',
         )