| Cover | Dec. 20, 2023 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 20, 2023 |
| Entity File Number | 001-41584 |
| Entity Registrant Name | ALPHATIME ACQUISITION CORP |
| Entity Central Index Key | 0001889106 |
| Entity Incorporation, State or Country Code | E9 |
| Entity Address, Address Line One | 500 5th Avenue |
| Entity Address, Address Line Two | Suite 938 |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10110 |
| City Area Code | 347 |
| Local Phone Number | 627-0058 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Units Each Consisting Of One Ordinary Share One Redeemable Warrant And One Right [Member] | |
| Title of 12(b) Security | Units, each consisting of one ordinary share, one redeemable warrant and one right |
| Trading Symbol | ATMCU |
| Security Exchange Name | NASDAQ |
| Ordinary Shares Par Value 0. 0001 Per Share [Member] | |
| Title of 12(b) Security | Ordinary Shares, par value $0.0001 per share |
| Trading Symbol | ATMC |
| Security Exchange Name | NASDAQ |
| Warrants Each Whole Warrant Exercisable For One Ordinary Share At Exercise Price Of 11. 50 Per Share [Member] | |
| Title of 12(b) Security | Warrants, each whole warrant exercisable for one ordinary share at an exercise price of $11.50 per share |
| Trading Symbol | ATMCW |
| Security Exchange Name | NASDAQ |
| Rights Each Right Entitling Holder Thereof To Onetenth Of One Ordinary Share [Member] | |
| Title of 12(b) Security | Rights, each right entitling the holder thereof to one-tenth of one ordinary share |
| Trading Symbol | ATMCR |
| Security Exchange Name | NASDAQ |
