@worldsendless java.time which is in bb can do this
@borkdude Well, it isn't one line, but it is basically one function. It took some research into how and what libraries to use, but here it is: https://gitlab.com/toryanderson/bb-julian-converter/
@worldsendless It's recommended to use java.time (newer thread-safe API) over java.text (single threaded, kinda deprecated)
@borkdude you mean the `java.text.SimpleDateFormat` ? I searched all over the internet and that is the only thing I could find to get the function right
```
(def from-fmt (java.time.format.DateTimeFormatter/ofPattern "yyyyMMdd"))
(def date (java.time.LocalDate/parse "20101022" from-fmt))
(def to-fmt (java.time.format.DateTimeFormatter/ofPattern "E yyyy.MM.dd"))
(println (.format to-fmt date))
```
