Course Content

Dealing with Dates and Times in Python

1. Working with Dates

What Day is it Today?Creating a Date Object Date Attributes Date Methods Date Formats One More Formatting Date Difference Arithmetic Operations with timedelta Objects

2. Working with Times

What Time is it Now?Creating a datetime Object Datetime Attributes Datetime Methods Datetime Formats 12-Hour and 24-Hour Formats Date and Time Difference Reading Date and Time from String

3. Timezones and Daylight Savings Time (DST)

The Variery of Timezones Timezone Examples Applying Timezone to Datetime Object What Time is it in ... ?Daylight Savings Time

4. Working with Dates and Times in pandas

Challenge: What Will We Work With?Challenge: Converting Columns into datetime Type Challenge: Extreme Trips Durations Challenge: Investigation Challenge: Negative Trip Duration Challenge: Is this Common Issue?Challenge: Fixing the Issues Challenge: Average Metrics Across Taxi Types Challenge: Corrected Metrics Across Taxi Types Challenge: Group by Period?

What Time is it in ... ?

As you might notice, the previous method simply labels to datetime timezone. The second approach is to convert existing datetime objects with no timezone to a certain timezone.

Let's consider the same datetime object as in the previous chapter, but this time with the second approach. The algorithm is the next:

Create datetime object with no timezone;
Create timezone object with a certain timezone name (optional);
Apply .astimezone() method to datetime object with timezone object as an argument.


              12345678910111213
            
# Load libraries and classes
import pytz
from pytz import timezone
from datetime import datetime

tz = timezone('Europe/Warsaw') # save timezone
dt = datetime(2021, 11, 1, 11, 25, 0) # create datetime object

dt_tz = dt.astimezone(tz) # convert dt to tz timezone

# Testing
print(f"Saved time: {dt}")
print(f"Converted time: {dt_tz}")

There you can see a clear difference: not only timezone was saved, but time was adjusted to timezone. Let's try to complete the task! Please note, that code is compiling on a dedicated server with GMT.

Task

Use the second approach to convert datetime object with a current timestamp to tz timezone:

Set 'America/New_York' timezone in tz.
Apply method to datetime object now to convert it to tz timezone.

Task

Use the second approach to convert datetime object with a current timestamp to tz timezone:

Set 'America/New_York' timezone in tz.
Apply method to datetime object now to convert it to tz timezone.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Section 3. Chapter 4

What Time is it in ... ?

As you might notice, the previous method simply labels to datetime timezone. The second approach is to convert existing datetime objects with no timezone to a certain timezone.

Let's consider the same datetime object as in the previous chapter, but this time with the second approach. The algorithm is the next:

Create datetime object with no timezone;
Create timezone object with a certain timezone name (optional);
Apply .astimezone() method to datetime object with timezone object as an argument.


              12345678910111213
            
# Load libraries and classes
import pytz
from pytz import timezone
from datetime import datetime

tz = timezone('Europe/Warsaw') # save timezone
dt = datetime(2021, 11, 1, 11, 25, 0) # create datetime object

dt_tz = dt.astimezone(tz) # convert dt to tz timezone

# Testing
print(f"Saved time: {dt}")
print(f"Converted time: {dt_tz}")

Task

Use the second approach to convert datetime object with a current timestamp to tz timezone:

Set 'America/New_York' timezone in tz.
Apply method to datetime object now to convert it to tz timezone.

Task

Use the second approach to convert datetime object with a current timestamp to tz timezone:

Set 'America/New_York' timezone in tz.
Apply method to datetime object now to convert it to tz timezone.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Section 3. Chapter 4

What Time is it in ... ?

As you might notice, the previous method simply labels to datetime timezone. The second approach is to convert existing datetime objects with no timezone to a certain timezone.

Let's consider the same datetime object as in the previous chapter, but this time with the second approach. The algorithm is the next:

Create datetime object with no timezone;
Create timezone object with a certain timezone name (optional);
Apply .astimezone() method to datetime object with timezone object as an argument.


              12345678910111213
            
# Load libraries and classes
import pytz
from pytz import timezone
from datetime import datetime

tz = timezone('Europe/Warsaw') # save timezone
dt = datetime(2021, 11, 1, 11, 25, 0) # create datetime object

dt_tz = dt.astimezone(tz) # convert dt to tz timezone

# Testing
print(f"Saved time: {dt}")
print(f"Converted time: {dt_tz}")

Task

Use the second approach to convert datetime object with a current timestamp to tz timezone:

Set 'America/New_York' timezone in tz.
Apply method to datetime object now to convert it to tz timezone.

Task

Use the second approach to convert datetime object with a current timestamp to tz timezone:

Set 'America/New_York' timezone in tz.
Apply method to datetime object now to convert it to tz timezone.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

As you might notice, the previous method simply labels to datetime timezone. The second approach is to convert existing datetime objects with no timezone to a certain timezone.

Let's consider the same datetime object as in the previous chapter, but this time with the second approach. The algorithm is the next:

Create datetime object with no timezone;
Create timezone object with a certain timezone name (optional);
Apply .astimezone() method to datetime object with timezone object as an argument.


              12345678910111213
            
# Load libraries and classes
import pytz
from pytz import timezone
from datetime import datetime

tz = timezone('Europe/Warsaw') # save timezone
dt = datetime(2021, 11, 1, 11, 25, 0) # create datetime object

dt_tz = dt.astimezone(tz) # convert dt to tz timezone

# Testing
print(f"Saved time: {dt}")
print(f"Converted time: {dt_tz}")

Task

Use the second approach to convert datetime object with a current timestamp to tz timezone:

Set 'America/New_York' timezone in tz.
Apply method to datetime object now to convert it to tz timezone.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Section 3. Chapter 4

Switch to desktop for real-world practiceContinue from where you are using one of the options below