Months of the Year in Punjabi-Nanakshahi Calendar

The Nanakshahi calendar is a calendar used by the Sikhs to commemorate the birthdays of the Sikh Gurus and other important events in Sikh history. It was introduced as an alternative to the traditional Bikrami calendar, which is based on Hindu lunar calculations.

Nanakshahi Calendar-- Names of the month are taken from Gurbani 

First 5 months have 31 days

Last 7 months have 30 days

1          Chet                 ਚੇਤ     14 March – 13 April                    Basant (Spring)

2          Vaisakh            ਵੈਸਾਖ    14 April – 14 May                     Basant (Spring)

3          Jeth                  ਜੇਠ      15 May – 14 June                       Garikham (Summer)

4          Harh                ਹਾੜ      15 June – 15 July                       Garisham (Summer)

5          Sawan              ਸਾਵਣ   16 July – 15 August                    Rut Baras (Rainy season)

6          Bhadon            ਭਾਦੋਂ     16 August – 14 September         Rut Baras (Rainy season)

7          Assu                 ਅੱਸੂ     15 September – 14 October        Sard (Autumn)

8          Kattak              ਕੱਤਕ   15 October – 13 November         Sard (Autumn)

9          Maghar            ਮੱਘਰ   14 November – 13 December      Sisiar (Winter)

10        Poh                   ਪੋਹ     14 December – 12 January          Sisiar (Winter)

11        Magh                ਮਾਘ    13 January – 11 February            Himkar (late Winter/early Spring)

12        Phaggan           ਫੱਗਣ   12 February – 13 March              Himkar (late Winter/early Spring)

 (source:wikipedia)