What is the difference between the date of admission and date of adjustment? (I-90)
Both refer to the date a person was granted resident status.
According to the USCIS, the date of admission and date of adjustment both refer to the date that a person was granted permanent resident or conditional permanent resident status CITATIONS: 1) Page 3, # 12: http://www.uscis.gov/sites/default/files/files/form/i-90instr.pdf; 2) http://www.uscis.gov/tools/glossary/adjustment-immigrant-status