I'm curious if there is a statistically demonstrable tendency not to schedule launches on certain days, such as those that contain leap seconds (see answers below this question), year changes, or superstitious connotations like Friday the thirteenth for example.
The three sources where I believe I can find or from where I can at least assemble a fairly complete list of orbital launch attempts are:
- Scrape the Space Launch Report site, (found in this answer).
- Download the complete SatCat from Celestrak and then do some sorting/filtering.
- Go to the JSR Launch Vehicle Database as mentioned here, and download potential orbital launches and launch attempts in lists G (Harvard 1957-62), O (COSPAR 1963-), U (Uncataloged (sic)), F (Orbital Failures), and E (Orbital pre-launch Explosions) all found in the list of lists on this page.
But even if I did all three of these, then filtered and merged, I would be missing most/all scrubbed launches; launches that were indeed scheduled, but didn't happen and were rescheduled for the next launch window.
Are there any, even partial lists that would include scrubbed launches for reasons like faulty non-critical sensor data, weather, downrange interference (e.g. fishing contests) etc? Even if not exhaustive, it may still be helpful and informative.