Viikon numerot vuonna 2156
- #MondaySunday
- 1 December 29, 2155 January 4
- 2 January 5 January 11
- 3 January 12 January 18
- 4 January 19 January 25
- 5 January 26 February 1
- 6 February 2 February 8
- 7 February 9 February 15
- 8 February 16 February 22
- 9 February 23 February 29
- 10 March 1 March 7
- 11 March 8 March 14
- 12 March 15 March 21
- 13 March 22 March 28
- 14 March 29 April 4
- 15 April 5 April 11
- 16 April 12 April 18
- 17 April 19 April 25
- 18 April 26 May 2
- 19 May 3 May 9
- 20 May 10 May 16
- 21 May 17 May 23
- 22 May 24 May 30
- 23 May 31 June 6
- 24 June 7 June 13
- 25 June 14 June 20
- 26 June 21 June 27
- 27 June 28 July 4
- 28 July 5 July 11
- 29 July 12 July 18
- 30 July 19 July 25
- 31 July 26 August 1
- 32 August 2 August 8
- 33 August 9 August 15
- 34 August 16 August 22
- 35 August 23 August 29
- 36 August 30 September 5
- 37 September 6 September 12
- 38 September 13 September 19
- 39 September 20 September 26
- 40 September 27 October 3
- 41 October 4 October 10
- 42 October 11 October 17
- 43 October 18 October 24
- 44 October 25 October 31
- 45 November 1 November 7
- 46 November 8 November 14
- 47 November 15 November 21
- 48 November 22 November 28
- 49 November 29 December 5
- 50 December 6 December 12
- 51 December 13 December 19
- 52 December 20 December 26
- 53 December 27 January 2, 2157