“Dry January” means to abstain from drinking alcohol for the month of January. It does not mean drinking dry wines, but there are jokes.
   
“Is a dry January when you only drink Sauvignon Blanc for a month?” was posted on Twitter by Darien Graham-Smith on January 10, 2012. “No wine in January. Comic wife says, ‘Thought you were having a dry January?’ Him, ‘It’s a dry Sauvignon Blanc’ (A comic illustration is shown.—ed.) was posted on Twitter by Marian on January 4, 2016. “Dry January (Sauvignon Blanc is pretty dry isn’t it?!)” was posted on Reddit—Funny on January 9, 2016. “My ‘dry’ January is Sauvignon Blanc” was posted on Twitter by sjones on January 6, 2021.
 
“Dry January is going well for me so far. I’ve not had a bath or a shower yet” is another “Dry January” joke.
     
       
Wikipedia: Dry January
Dry January is a public health campaign urging people to abstain from alcohol for the month of January, particularly practised in the United Kingdom, France and Switzerland.
 
The campaign, as a formal entity, appears to be relatively recent, being described as having “sprung up in recent years” even in 2014. However, the Finnish government had launched a campaign called “Sober January” in 1942 as part of its war effort. The term “Dry January” was registered as a trademark by the charity Alcohol Concern in mid-2014; the first ever Dry January campaign by Alcohol Concern occurred in January 2013.
 
Wikipedia: Sauvignon blanc
Sauvignon blanc is a green-skinned grape variety that originates from the Bordeaux region of France. The grape most likely gets its name from the French words sauvage (“wild”) and blanc (“white”) due to its early origins as an indigenous grape in South West France. It is possibly a descendant of Savagnin. Sauvignon blanc is planted in many of the world’s wine regions, producing a crisp, dry, and refreshing white varietal wine.
             
Twitter
Darien Graham-Smith
@DarienGS
Replying to @__jacqui__
@__jacqui__ Is a dry January when you only drink Sauvignon Blanc for a month?
4:18 PM · Jan 10, 2012·Twitter Web Client
   
Twitter
Katherine Tallant
@katetallant
@katediamond I saw some poster for that dry January thing last week. *finishes glass of excellent Chilean Sauvignon Blanc*
4:19 PM · Jan 1, 2013·Twitterrific for iOS
   
Twitter
Scotty
@scottybev
Decided on trying this dry January too. So stocking up on Sauvignon Blanc & Riesling.
2:00 PM · Jan 3, 2013·Twitter for iPhone
   
Twitter
Goonerrhea
@Gunner_P
My dry January is going very well so far.
Two of my favourites have been Sauvignon Blanc and Albariño.
4:38 PM · Jan 13, 2015·Tweetbot for iΟS
   
Twitter
Mrs Trellis
@MrsTrellis1
Replying to @BBCFood
@BBCFood Dry January for me. I’m only drinking Sauvignon Blanc, Picpoul de Pinet and Prosecco.
1:05 PM · Jan 15, 2015·Twitter Web Client
 
Twitter
Chris Needham
@Frogponds1
Wife: I thought you were having a dry January..
Me: I am, it’s a Sauvignon Blanc
Wife:
Me:
Wife:*death stare*
4:28 PM · Jan 17, 2015·Twitter Web App
   
Twitter
Cheese Curry
@simonplotkin
‘I thought you were having a dry January!?!?’
‘It is dry - it’s a Sauvignon Blanc!!!!’
‘Your alcoholism is destroying this family.’
5:21 AM · Jan 4, 2016·Twitter for iPhone
   
Twitter
Marian
@thyroidlady
No wine in January. Comic wife says, “Thought you were having a dry January?” Him, “It’s a dry Sauvignon Blanc.”
(A comic illustration is shown.—ed.)
11:17 PM · Jan 4, 2016·Twitter for iPad
 
Reddit—Funny
Posted by u/thatboygwyn January 9, 2016
Dry January (Sauvignon Blanc is pretty dry isn’t it?!)
         
Twitter
Nick Brown
@nickthetoolman
#DryJanuary is going well.
Really getting used to this sauvignon blanc.
3:38 PM · Jan 13, 2016 from London, England·Twitter for Android
 
Twitter
Christopher Davis
@c_p_davis
Does it still count as “Dry January” if one sticks to Sauvignon blanc?
1:07 PM · Jan 3, 2017·Twitter for iPhone
 
Twitter
Karl Byrne
@KB_UDMIRadio
I’m doing a dry January.
I just bought 6 cases of Sauvignon blanc.
11:30 AM · Jan 4, 2017·Facebook
 
Twitter
The Naas Ball
@NaasBall
I’m doing a dry January.
I just bought 6 cases of Sauvignon blanc.
3:47 PM · Jan 13, 2017·Twitter for iPhone
 
Twitter
Christopher Farrelly
@ChrisFarrelly
Replying to @itsanitarani
Doesn’t #DryJanuary mean we only drink Sauvignon Blanc, Albariño and Chardonnay ? Go for loophole!
12:32 PM · Jan 12, 2018·Twitter for Android
   
Twitter
Maud Hodson
@maudhodson
Replying to @katehelencarter @Lucym808 and @therealjhutch42
The only dry January I’m doing is a nice Sauvignon Blanc - cheers!
1:25 PM · Jan 12, 2018·Twitter Web Client
 
Twitter
Bob Kostic
@causticbob
The wife came home from work to find me sat on the couch, watching tv and drinking wine.
“What’s this? You said you were having a dry January!” She shouted.
“It is dry” I replied, “it’s a sauvignon blanc.”
7:32 PM · Jan 6, 2021·Twitter Web App

Twitter
sjones
@sandrahalljones
Replying to @meenaharris
My “dry” January is Sauvignon Blanc.
8:02 PM · Jan 6, 2021·Twitter Web App
 
Twitter
Erika Leigh
@_ErikaLeigh
Replying to @JakeBrownRadio
My new dry January is Sauvignon Blanc and Pinot Grigio.
8:30 PM · Jan 6, 2021·Twitter for iPhone