A separate meeting with Portuguese pilot union SPAC on Thursday was "very amicable" he said.
Ryanair's decision to move towards trade union recognition marks a historic turning point, given that pugnacious boss Michael O'Leary - in charge since 1994 - had vehemently opposed any union representation for staff.
Impact official Ashley Connolly welcomed what she described as a "breakthrough".
Ingolf Schumacher, head of VC's industrial department, said: "Ryanair's public offer to conduct negotiations with VC can only be classified as a further publicity stunt".
"This advance is good news for Ryanair pilots, passengers and shareholders", he said.
Just hours before the German strike call, Ryanair was able to stave off year-end travel chaos on home soil after clinching a deal with Ireland's Impact union.
"We hope that our German pilots will put the needs of our customers first during Christmas week". "We will be doing our utmost to minimize any disruptions to the Christmas travel plans of our German customers".
The union representing Ryanair pilots in Germany has announced that it is calling for the airline's German-based pilots to strike tomorrow - Friday, December 22 - from 5am to 9am (04.00 to 08:00 UTC) at all German airports.
It said: "This refusal clearly shows that the principles of trade union autonomy are disregarded by Ryanair and that the company does not truly desire to enter into constructive negotiations".
It agreed to meet the union in Frankfurt on January 5 to "progress and resolve these issues, which Ryanair expects will lead to a collective labour agreement (CLA) for Ryanair's pilots in Germany."?
Ryanair last week took the unprecedented step of offering to finally recognize unions after crew in Germany, Ireland, Britain, Italy, Spain and Portugal threatened walkouts in long-running rows over pay and conditions. As a result, the danger of industrial action by Irish-based pilots had receded.
IMPACT subsequently released a statement on Thursday to confirm Ryanair's recognition of IMPACT as the representative of the airline's pilots for collective bargaining purposes, with immediate effect.
It added: "Ryanair has also submitted a set of proposals on pay and conditions, procedures and dispute resolution for its Irish based pilots, and looks forward to concluding an early agreement on these issues with its Irish Ryanair pilot company council".