Observational evidence for bursty SFHs in JADES/HST-DEEP. Left: Example of a galaxy in a lull phase at redshift z = 4.5. The spectrum is blue with a quite steep UV slope, but low EW in Hα, and [OIII], and it exhibits a quite strong Balmer break. Right: Example of a galaxy in a regular phase at redshift z = 4.9. The spectrum is blue with a steep UV slope, but quite low EW in Hα, Hβ, and [OIII], and it exhibits a marginal Balmer break. Both galaxies exhibit low EW in the nebular emission lines.