[mostafahagras]

Problem

In Africa/Cairo on 2026-10-30, local midnight was ambiguous:

Dust panicked while resolving the start of the current day:

❯ TZ=Africa/Cairo dust

thread 'main' (5079907) panicked at /Users/mostafa/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/du-dust-1.2.6/src/config.rs:200:10:
Ambiguous local time, ranging from 2026-10-30T00:00:00+02:00 to 2026-10-30T00:00:00+03:00
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

It also caused config::tests::test_get_current_date_epoch_seconds to fail in my local checkout.

Fix

Use Chrono's earliest matching instant for ambiguous local midnight.

Verification

• TZ=Africa/Cairo cargo test passes.
• TZ=Africa/Cairo cargo run runs without panicking.