Viikon numerot vuonna 2123
- #MondaySunday
- 1 January 4 January 10
- 2 January 11 January 17
- 3 January 18 January 24
- 4 January 25 January 31
- 5 February 1 February 7
- 6 February 8 February 14
- 7 February 15 February 21
- 8 February 22 February 28
- 9 March 1 March 7
- 10 March 8 March 14
- 11 March 15 March 21
- 12 March 22 March 28
- 13 March 29 April 4
- 14 April 5 April 11
- 15 April 12 April 18
- 16 April 19 April 25
- 17 April 26 May 2
- 18 May 3 May 9
- 19 May 10 May 16
- 20 May 17 May 23
- 21 May 24 May 30
- 22 May 31 June 6
- 23 June 7 June 13
- 24 June 14 June 20
- 25 June 21 June 27
- 26 June 28 July 4
- 27 July 5 July 11
- 28 July 12 July 18
- 29 July 19 July 25
- 30 July 26 August 1
- 31 August 2 August 8
- 32 August 9 August 15
- 33 August 16 August 22
- 34 August 23 August 29
- 35 August 30 September 5
- 36 September 6 September 12
- 37 September 13 September 19
- 38 September 20 September 26
- 39 September 27 October 3
- 40 October 4 October 10
- 41 October 11 October 17
- 42 October 18 October 24
- 43 October 25 October 31
- 44 November 1 November 7
- 45 November 8 November 14
- 46 November 15 November 21
- 47 November 22 November 28
- 48 November 29 December 5
- 49 December 6 December 12
- 50 December 13 December 19
- 51 December 20 December 26
- 52 December 27 January 2, 2124