Posts
- How OPT unemployment days are countedOctober 17, 2026 · Part-time and volunteer hours, STEM per-employer hours, replacement EADs, cap-gap and trips, with worked examples and an open-source day counter.
- F-1 to H-1B: cap-gap and the 60-day grace periodOctober 17, 2026 · Status vs. work permission, what happens if the petition fails, the H-1B grace period after a job ends, a date calculator and the F-1 records to keep.
- I-94 travel history for a green card or N-400October 17, 2026 · What the I-485 and N-400 ask for, gaps in CBP travel history, CBP FOIA requests and a script that turns CBP rows into trips.
Start with the guides
The posts build on the shorter guides. For the basics, start with all guides, the OPT unemployment days calculator and the I-94 guide.
These articles summarize official information. They are not legal, immigration or tax advice. Confirm your situation with your DSO or a qualified immigration attorney.