Is 1945 an abstract noun

1945 (nineteen forty-five) is an abstract nounas a Word for a year. All Words for time are abstract nouns; time is a concept.

1945 (one thousand, nine hundred, forty-five) is a concrete noun as a Word for a physical count of something (for example: There are 1,945 tiles in the mosaic.)

1945 (one thousand, nine hundred, forty-five) is an abstract noun as a Word for a count of something abstract (for example: There are 1,945 legends our ancestors have handed down to us. It takes a lifetime to learn them and to pass them down to our children.)