Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Title | Series | Director | Production Num. | Release date |
| --- | --- | --- | --- | --- |
| He Was Her Man | MM | Friz Freleng | 7636 | 1937-01-02 |
| Porky the Wrestler | LT | Tex Avery | 7635 | 1937-01-09 |
| Pigs Is Pigs | MM | Friz Freleng | 7717 | 1937-01-09 |
| Porky's Road Race | LT | Frank Tashlin | 7716 | 1937-02-07 |
| Picador Porky | LT | Tex Avery | 7715 | 1937-02-27 |
| The Fella with the Fiddle | MM | Friz Freleng | 7729 | 1937-03-27 |
| Porky's Romance | LT | Frank Tashlin | 7751 | 1937-04-03 |
| She Was an Acrobat's Daughter | MM | Friz Freleng | 7750 | 1937-04-10 |
| Porky's Duck Hunt | LT | Tex Avery | 7749 | 1937-04-17 |
| Porky and Gabby | LT | Ub Iwerks | 7921 | 1937-05-15 |
| I Only Have Eyes For You | MM | Tex Avery | 7638 | 1937-05-18 |
| Clean Pastures | MM | Friz Freleng | 7876 | 1937-05-22 |
| Porky's Building | LT | Frank Tashlin | 8093 | 1937-06-19 |
| Uncle Tom's Bungalow | MM | Tex Avery | 7912 | 1937-07-12 |
| Streamlined Greta Green | MM | Friz Freleng | 7796 | 1937-06-19 |
| Sweet Sioux | MM | Friz Freleng | 7922, BR 2-13 | 1937-06-26 |
| Porky's Super Service | LT | Ub Iwerks | 8050 | 1937-07-03 |
| Egghead Rides Again | MM | Tex Avery | 7889 | 1937-07-17 |
| Porky's Badtime Story | LT | Bob Clampett | 7797 | 1937-07-24 |
| Plenty of Money and You | MM | Friz Freleng | 8052 | 1937-07-31 |
| Ain't We Got Fun | MM | Tex Avery | 7780 | 1937-08-02 |
| Porky's Railroad | LT | Frank Tashlin | 7877 | 1937-08-07 |
| Get Rich Quick Porky | LT | Bob Clampett | 8148 | 1937-08-28 |
| Speaking of the Weather | MM | Frank Tashlin | 8053 | 1937-09-04 |
| Porky's Garden | LT | Tex Avery | 7785 | 1937-09-11 |
| Dog Daze | MM | Friz Freleng | 8054 | 1937-09-18 |
| I Wanna Be a Sailor | MM | Tex Avery | 8091 | 1937-09-25 |
| Rover's Rival | LT | Bob Clampett | 8228 | 1937-10-09 |
| The Lyin' Mouse | MM | Friz Freleng | 8092 | 1937-10-16 |
| The Case of the Stuttering Pig | LT | Frank Tashlin | 8051 | 1937-10-30 |
| Porky's Double Trouble | LT | Frank Tashlin | 7950 | 1937-11-13 |
| A Sunbonnet Blue | MM | Tex Avery | 8055 | 1937-12-01 |
| Porky's Hero Agency | LT | Bob Clampett | 8308 | 1937-12-04 |
| The Woods Are Full Of Cuckoos | MM | Frank Tashlin | 8149 | 1937-12-04 |
| September in the Rain | MM | Friz Freleng | 8183 | 1937-12-18 |
| Little Red Walking Hood | MM | Tex Avery | 8181 | 1937-12-23 |
Question:
What was the release date for Production Number 8181?
Answer:
1937-12-23