## Bug description

The grouped-by-month view in charts is hella confusing. The x-axis shows a date that does not reflect the value on the y-axis.

1. the y-axis shows the number for the END of the month
2. the x-axis reads as "beginning of the month"

![CleanShot 2024-02-05 at 10 23 30@2x](https://github.com/PostHog/posthog/assets/35429197/d78df745-8319-4b78-95fa-d96f18aee357)

### Comparison with daily grouping

Compare the "group by month" view with "group by day". The x-axis labeling aligns with the y-axis values. 

![CleanShot 2024-02-05 at 10 29 20@2x](https://github.com/PostHog/posthog/assets/35429197/998825fa-7406-4214-8310-8f173980f80c)


## How to reproduce

1. Group a chart by month 
2. select "unique events"

## Proposal 

### 1. easy fix - remove the "1." from the labelling

- will still confuse readers with "is this the beginning or end of the month"

![CleanShot 2024-02-05 at 10 23 30@2x](https://github.com/PostHog/posthog/assets/35429197/1a0ae6d4-0e02-4b32-86ab-7b0e069655ed)

### 2. correct fix - show end of month

- removes ambiguity from "is that the beginning or end of month"
- harder to implement because months have different end days

![CleanShot 2024-02-05 at 10 23 30@2x](https://github.com/PostHog/posthog/assets/35429197/61226346-7f97-4bcd-87bf-53fc83c75245)


cc @jannesblobel
posthog/utils.py
"""Returns whether a new organization can be created in the current instance.
    Organizations can be created only in the following cases:
    - if on PostHog Cloud
    - if running end-to-end tests
    - if there's no organization yet
    - if an appropriate license is active and MULTI_ORG_ENABLED is True
    """
    from posthog.models.organization import Organization
    if (
        is_cloud()  
        or (settings.DEMO and user.is_anonymous)  
        or settings.E2E_TESTING
        or not Organization.objects.filter(for_internal_metrics=False).exists()  
    ):
        return True
    if settings.MULTI_ORG_ENABLED:
        license = get_cached_instance_license()
        if license is not None and AvailableFeature.ZAPIER in license.available_features:
            return True
        else:
            logger.warning("You have configured MULTI_ORG_ENABLED, but not the required premium PostHog plan!")
    return False
def get_instance_available_sso_providers() -> Dict[str, bool]:
    """
    Returns a dictionary containing final determination to which SSO providers are available.
    SAML is not included in this method as it can only be configured domain-based and not instance-based (see `OrganizationDomain` for details)
    Validates configuration settings and license validity (if applicable).
    """
    output: Dict[str, bool] = {
        "github": bool(settings.SOCIAL_AUTH_GITHUB_KEY and settings.SOCIAL_AUTH_GITHUB_SECRET),