# Time & Dates
High-precision time handling with femtosecond resolution and support for
multiple astronomical time scales.
## Time Scales
Lox supports the following astronomical time scales:
| TAI | International Atomic Time | Primary atomic time scale |
| TT | Terrestrial Time | Used for geocentric ephemerides |
| TDB | Barycentric Dynamical Time | Used for solar system ephemerides |
| TCB | Barycentric Coordinate Time | Relativistic coordinate time |
| TCG | Geocentric Coordinate Time | Relativistic coordinate time |
| UT1 | Universal Time | Tied to Earth's rotation |
## Quick Example
```python
import lox_space as lox
# Create a time instant
t = lox.Time("TAI", 2024, 6, 15, 12, 30, 45.5)
# From ISO string
t = lox.Time.from_iso("2024-06-15T12:30:45.5 TAI")
# Convert between scales
t_tt = t.to_scale("TT")
# Time arithmetic with unit constants
t2 = t + 1.5 * lox.hours
dt = 30 * lox.minutes
# Work with UTC
utc = lox.UTC(2024, 6, 15, 12, 30, 45.5)
t_tai = utc.to_scale("TAI")
```
---
::: lox_space.Time
options:
show_source: false
---
::: lox_space.UTC
options:
show_source: false
---
::: lox_space.TimeDelta
options:
show_source: false
---
::: lox_space.TimeScale
options:
show_source: false
---
::: lox_space.TimeSeries
options:
show_source: false